Second Others

16th June 202216th June 2022 By Simon

Today we’re looking at the words for second or other and related things in Celtic languages.

Second, Other

Proto-Celtic	*alyos [ˈal.jos] = other, second
Leptonic	𐌀𐌋𐌉𐌏𐌔 (alios) = second, other
Gaulish	allos, alos = second, other
Old Irish (Goídelc)	aile = other, second indala [in͈ˈdala] = other (of two)
Middle Irish (Goídelc)	aile, oile, eile = other, second, another indala = one (of two), less often, the other, later, the second
Irish (Gaeilge)	eile [ˈɛlʲə] = other, another, next, more, else dara [ˈd̪ˠɑɾˠə / ˈd̪ˠaɾˠə] = second (2ⁿᵈ), next, other
Scottish Gaelic (Gàidhlig)	eile [elə] = other, another, else eileadh [eləɣ] = other eilich [elɪç] = alienate eileachadh = (act of) alienating, alienation, othering dala [dal̪ˠə] = second (2ⁿᵈ)
Manx (Gaelg)	elley = other, else, another, additional, alternative derrey = second in command, till, pending yn derrey = second (2ⁿᵈ)
Proto-Brythonic	*ėl [ˈe̝ːlˑ] = second, other
Middle Welsh (Kymraec)	ail, eil, eyl = second, other
Welsh (Cymraeg)	ail [ai̯l] = second, like, similar, equivalent, equal; son, grandson, heir, descendant; helper, supporter ailgylchu = to recycle eilaidd = secondary eilfed = second (number) eilaid = second (of time)
Middle Cornish	eil = second, another
Cornish (Kernewek)	eyl = one of two, second eyla = to second eylafinans = refurbishment eylgelghya = to recycle eylskrifa = to copy
Middle Breton)	eil = second
Breton (Brezhoneg)	eil [ˈɛjl] = second eilvet = second (number) eilad = second, copy, reproduction eilañ = to accompany, copy eiladiñ = to duplicate eiladuriñ = to reproduce, reproduction

Words marked with a * are reconstructions.

Etymology: from the Proto-Indo-European *h₂élyos (other, another), from *h₂el- (beyond, other) [source]. The Old Irish word indala, which is the root of the Irish dara, the Scottish Gaelic dala and the Manx derrey, comes from the Old Irish ind (the) and aile (second) [source]..

Some words from the same PIE roots include else, all and ultra in English, al (all, all of) in Dutch, eller (else, otherwise) in Danish, Norwegian and Swedish, and այլ (ayl – another, other) in Armenian [source].

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, eDIL – Electronic Dictionary of the Irish Language, In Dúil Bélrai English – Old Irish glossary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Gerlyvyr Cernewec, Dictionaire Favereau, TermOfis, Le dictionnaire diachronique du breton, Geriafurch, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Hard Steel

26th May 202227th May 2022 By Simon

Today we’re looking at the words for steel and related things in Celtic languages.

Old Irish (Goídelc)	dúr = hard, hardy, resolute, rigid
Middle Irish (Gaoidhealg)	dúr = rigid, hard, solid; difficult; hard to bear; strict, austere; hardy, resolute; unfeeling, dour, obdurate
Irish (Gaeilge)	dúr = hard, rigid, solid; dour, grim, obstinate; dense, stupid, blunt, insensitive; sluggish dúramán = dull-witted, stupid person dúramánta = dull-witted, stupid dúranta = dour, grim, morose, sullen dúrantacht = dourness, sullenness dúrapóg = surly person dúrchroí = hard heart, hardness of heart dúrchroíoch = hard hearted
Scottish Gaelic (Gàidhlig)	dùr [duːr] = stubborn, intractable; obstinate, dull, stupid; persevering durganta = rigid, stiff, hardened; robust, rigorous; obstinate, dogged; sullen, morose; grim, forbidding
Manx (Gaelg)	douyr = mournful, uncomfortable, unhappy, afflicting
Proto-Brythonic	*dʉr = hard, hard metal, steel
Middle Welsh (Kymraec)	dur = steel
Welsh (Cymraeg)	dur [dɨːr / diːr] = steel, steel weapon; hard, cruel duraidd = steely, hard, faithful, true durawdr = steel sword or lance dur bwrw = cast steel edau ddur = wire fel y dur = true as steel, like steel llifddur = file, rasp
Cornish (Kernewek)	dur = steel dur dinamm = stainless steel
Breton (Brezhoneg)	dir = steel dir disvergi = stainless steel kazeg-dir = bicycle (“steel mare”)

Etymology from the Latin dūrus (hard, rough, harsh), from the Proto-Indo-European *drew- (hard, fast), from *dóru (tree) [source].

Words from the same Latin root include the Scots word dour (hard, stern, severe, relentless), possibly via Middle Irish, which was also borrowed into English and means stern, harsh or forbidding; the French word dur (hard, tough, harsh), the Italian word duro (hard, tough, harsh), and the Spanish word duro (hard, form, solid) [source].

Words from the same PIE root include Celtic words for oak (tree), and the English words true, trough and trim [source].

Irish (Gaeilge)	cruach [kɾˠuəx / kɾˠɔx] = steel cruachghreanadóireacht = steel-engraving cruachobair = steelwork cruachphláta = steel-plate cruachphlátáilte = steel-plated
Scottish Gaelic (Gàidhlig)	cruaidh [kruəj] = steel; stone anchor; hard, rocky ground
Manx (Gaelg)	creoighey = steel

Etymology from the Irish crua (hard), from the Old Irish crúaid (hard, hardy, harsh, stern, strict), from the Proto-Celtic *kroudis (rude), possibly from *krū- (blood), from the Proto-Indo-European *krewh₂-. (blood) [source].

Scottish Gaelic (Gàidhlig)	stàilinn [sdaːl̪ʲɪn̪ʲ] = steel clòimh-stàilinn = steel wool obraiche-stàilinn = steelworker ionad-stàilinn = steelworks
Manx (Gaelg)	staillin, steillyn, steillin = steel staillinagh = steel-maker, steel obbyr staillinagh = steelwork ollan staillinagh = steel wool snaie staillinagh = steel wire towse staillinagh = steelyard

Etymology from the Old Norse stál (steel, sword), from the Proto-Germanic stahlą (steel), from the Proto-Indo-European *stek- (to be firm, stand fast) [source].

Words from the same Proto-Germanic root include steel in English, staal (steel) in Dutch, Stahl (steel) in German, and stål (steel, tool) in Danish [source].

Words marked with a * are reconstructions.

Fish

25th October 202014th October 2024 By Simon

Words for fish and related things in the Celtic languages.

Proto-Celtic	*ɸēskos = fish
Old Irish (Goídelc)	íasc = fish íascach = fish, fishing
Middle Irish (Gaoidhealg)	íasc, iasc, īesc, éisc, escc = fish íascach, iasccach = abounding in fish íascaire, iscaire = fisherman íasmar, iascchmar = full of fish, productive in fish
Irish (Gaeilge)	iasc [iəsˠk] = fish, to fish iasc = fishing, fishery iascaire = fisherman iascaireacht = fishing, fishery iasceolaíocht = ichthyology (scientific study of fish) iasciteach = fish-eating, ichthyophagous iascúil = abounding in fish, easy to fish, good at fishing
Scottish Gaelic (Gàidhlig)	iasg [iəsg] = fish, Pisces iasgach [iəsgəx] = fishing, angling, fishery iasgachadh [iəsgəxəɣ] = (act of) fishing iasgadair [iəsgədɪrʲ] = fisher(man) iasgail [iəsgal] = fishy, pertaining to fish, good for fishing iasgan [iəsgan] = small fish, mussel
Manx (Gaelg)	(y)eeast = fish eeastagh(ey) = to angle, to fish, angling, fishing eeasteyr = fisherman eeasteyraght = fishery, fishing eeasteyrys = fishing eeastoil = abounding in fish, fishy eeast-oaylleeaght = ichthyology
Proto-Brythonic	uisk = fish Uɨsk = fish, river name (originally meaning “abundant in fish”)
Welsh (Cymraeg)	Wysg [uːɨ̯sk / ʊi̯sk] = Usk (a river and town in south Wales) Caerwysg = Exeter

Etymology: from the Proto-Indo-European *pisḱ-/peysḱ- (fish) [source]. The name of the river Exe in Devon comes from the same root, as does Exmoor, where the river rises, Exmouth, where it meets the sea, and Exeter, which stands on the river. The rivers Esk (North Yorkshire, Cumbria, Dumfries and Galloway, and East Lothian) and Axe (one in Dorset, Somerset, Devon; and another in Somerset) get their names from the same root [source].

Proto-Brythonic	pɨsk [pɨsk] = fish pɨskọd [pɨˈsˑkɔːd] = fish (pl)
Middle Welsh (Kymraec)	pisscaud, psycgaut, pesgod = fish(es), Pisces pysgodfwyd = ichthyophagous, piscivorous, fish-eating, fish-meal pysgodlyn, pyscotlyn = fish-pool, fish-pond peskod ha, pyscotta, pyscota = to fish, angle, fishing pyscodwr, pyscod-wr, pyscottwr = fisherman, fisher
Welsh (Cymraeg)	pysgod [ˈpəsɡɔd] = fish(es), Pisces pysgodaidd = fishy, piscine, piscatory, piscatorial pysgodfwyd = ichthyophagous, piscivorous, fish-eating, fish-meal pysgodig = full of fish pysgodlyn = fish-pool, fish-pond pysgota = to fish, angle, fishing industry pysgotwr = fisherman, fisher, angler, kingfisher, fishmonger
Middle Cornish (Cernewec)	pisc, pysc = fish piscadur, pysgadyr = fisherman pisclin = fishpond pisgetta, pysgetta = to fish
Cornish (Kernewek)	pysk [pɪːsk] / pesk = fish pyskador, peskador = fisherman pyskadores, peskadores = fisherwoman pyskessa, peskecha = to fish pysklyn, pesklyn = fishpond pyskva, peskva = aquarium
Middle Breton (Brezonec)	pesq(uet) = fish
Breton (Brezhoneg)	pesk(ed) [ˈpes.k(et)] = fish pesker [ˈpeskɛʁ] = fishmonger, fisher(man) pesketa [pɛs.ˈke.ta] = to fish pesketaerezh [pɛs.ke.ˈtɛː.rɛs] = fishing, fisheries

Etymology: from the Latin piscātus, past participle of piscor (to fish), from piscis (fish), from Proto-Indo-European *péysks (fish) [source]. Words from the same PIE root include peshk (fish) in Albanian, pesce (fish) in Italian, poisson (fish) in French, fish, piscine (pertaining to fish), Pisces in English, and fisk (fish, Pisces) in Danish [source].

Interesting idioms related to fish:

Irish: Iasc as uisce i do bhéal! = Restrain your tongue! (“Fish out of water in your mouth”)
Irish: Ar iascadh libh? = Did you catch fish / succeed in your quest
Irish: Ar iascach ar dhuine = to fish information from sb
Scottish Gaelic: gaoth an iar, iasg is bainne = wind from the West, fish and milk
Welsh: pysgota mewn dŵr llwyd = to fish in troubled waters (“to fish in grey water”)

Sources: Wiktionary, Etymological Dictionary Of Proto Celtic, In Dúil Bélrai English – Old Irish glossary, eDIL – Electronic Dictionary of the Irish Language, Teanglann.ie, Am Faclair Beag, An etymological dictionary of the Gaelic language, Fockleyreen: Manx – English Dictionary, Online Manx Dictionary, Gaelg Corpus, Geiriadur Prifysgol Cymru, Lexicon cornu-britannicum : a dictionary of the ancient Celtic language of Cornwall, Gerlyver Kernewek, Devri : Le dictionaire diachronique du breton, Dictionnaires bilingues de Francis Favereau / Edition Skol Vreizh, TermOfis

Swans

1st August 202017th April 2023 By Simon

Words for swan (cygnus) in Celtic languages.

Proto-Celtic	*eli- = swan
Gaulish	ala = swan alauda = skylark
Old Irish (Goídelc)	elu = swan
Middle Irish (Gaoidhealg)	ela(e) = swan
Irish (Gaeilge)	eala [ˈalˠə] = swan ealach = frequented by swans eala bhalbh = mute swan (Cygnus olor) eala ghlorach = whooper swan (Cygnus cygnus)
Scottish Gaelic (Gàidhlig)	eala [jal̪ˠə] = swan eala bhàn = mute swan eala fhiadhaich = whooper swan ealag, eala-ghlas = cygnet, young swan eala-bheag = Bewick’s (tundra) swan (Cygnus columbianus bewickii)
Manx (Gaelg)	olla, ollay = (mute) swan ollay chiaulee = whooper swan eean olla = cygnet
Proto-Brythonic	alarkos = swan
Middle Welsh (Kymraec)	alarch = swan
Welsh (Cymraeg)	alarch [ˈalarχ/ˈaːlarχ] = swan, the constellation Cygnus alarchaidd = pertaining to a swan, swanlike alarchen = cygnet alarches = female swan alarchwedd = swanlike alarch dôf, alarch mud = mute swan alarch y gogledd, alarch chwibanol, alarch gwyllt = whooper swan
Old Cornish	elerch = swan
Middle Cornish (Cernewec)	elerch = swan
Cornish (Kernewek)	alargh = (mute) swan
Middle Breton (Brezonec)	alarc’h = swan alarc’hez = female cygnet
Breton (Brezhoneg)	alarc’h = swan alarc’h roueel = mute swan alarc’h-kristilh = whooper swan

Etymology: from the Proto-Indo-European *h₁el- (swan, bird, waterfowl) [source].

Words from the same Proto-Celtic root include alondra (lark) in Spanish, alouette (lark) in French, and allodola (skylark) in Italian. They were probably borrowed from the Gaulish alauda (skylark), from ala (swan) [Source].

Words from the same PIE root include auk (swan) in English, alke (auk) in Danish and Norwegian, and álka (razorbill) in Faroese and Icelandic [Source].

Words marked with a * are reconstructions.

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, eDIL – Electronic Dictionary of the Irish Language, In Dúil Bélrai English – Old Irish glossary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionaire Favereau, TermOfis, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Oak (trees)

21st August 201923rd November 2024 By Simon

Words for oak (tree) and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	*daru [d̪ˠaɾʲ] = oak
Gaulish	Dervo = used in placenames
Old Irish (Goídelc)	dair [d̪ˠaɾʲ] = oak
Middle Irish (Gaoidhealg)	dair, daur = an oak, the letter D in the Ogham alphabet (ᚇ) dairbre, dairbhre = an oak, oakling, a grove of oak grees, an oak wood dairde, daurde = oaken dair-ḟid, dauruth = an oak wood
Irish (Gaeilge)	dair [d̪ˠaɾʲ] = oak, the letter D in the Ogham alphabet (ᚇ) dairbhre = oaks, oak-grove daireach = planted with / full of oaks doire [ˈd̪ˠɛɾʲə] = oak-wood; wood, grove, thicket
Scottish Gaelic (Gàidhlig)	dair [darʲ] = oak (archaic), the letter D, ᚛ᚇ᚜ in Ogham dairbhre = oak, nursery or grove of oaks darach [darəx] = oak, oaken, made of oak; ship (poetic) darag [darag] = small/dwarf oak, stunted/branchy tree (which is not useable for working)
Manx (Gaelg)	darragh = oak, oaken, oak grove, oak wood darrag = oak, beam, cast (fishing), snood, hairline darree = oak
Proto-Brythonic	*dar [ˈdar] = oak tree
Middle Welsh (Kymraec)	dar, dâr = oak derwd(y) = oak house, oratory, prayer house, coffin derwin, deruin = make of oak, oaken, abounding in oaks, strong, robust, oak timber
Welsh (Cymraeg)	dâr [ˈdaːr] = oak tree, foremost warrior, leader, mighty lord derw = oak trees derwen [ˈdɛrwɛn] = oak tree derwin = make of oak, oaken, abounding in oaks, strong, robust, oak timber der(w)lwyn = oak grove, oak wood
Old Cornish	dar = oak
Middle Cornish (Cernewec)	dar = an oak
Cornish (Kernewek)	dar [daːr / dæːr] = oak derwen = oak tree derw = oak trees
Old Breton	daeru = oaks
Middle Breton (Brezonec)	deru = oaks
Breton (Brezhoneg)	dar [dɑːr] = oak derv [ˈdɛrw/ˈdɛː.ro] = oaks dervenneg = with oak trees dervoed [dɛʁwət] = oak grove, oak wood

Etymology: from the Proto-Indo-European *dóru (tree) [source].

Words from the same Proto-Celtic root possibly include làrix (larch) in Catalan, lariks (larch) in Dutch learag (larch) in Scottish Gaelic, larch in English, Lärche (larch) in German, and lærk (larch) in Danish [source].

Words from the same PIE root include δόρυ (dóry – spear) in Greek, dervà (tar, resin) in Lithuanian terva (tar) in Finnish, dearbh (sure, certain) in Irish, tree, trim, and trough, true in English, and trä (wood) in Swedish [source].

Proto-Celtic	*tannos = green oak
Gaulish	*tannos = oak
Old Irish (Goídelc)	tinne = holly, elder
Middle Irish (Gaoidhealg)	tinne = holly, elder, the letter t in the Ogham alphabet (ᚈ)
Irish (Gaeilge)	tinne = the letter t in the Ogham alphabet (ᚈ)
Scottish Gaelic (Gàidhlig)	teine/tinne [tʲenə] = gorse, whin, furze (archaic), the letter t (ᚈ) in Ogham
Welsh (Cymraeg)	taneru, tener(i)o = to tan (hide) tanerdy = tannery tanerwr = tanner (of hides)
Old Cornish	tannen = oak (?)
Middle Cornish (Cernewec)	tonnen = bark glastanen, glastennen, glastan = (scarlet) oak
Cornish (Kernewek)	glastanen gelyn = holly/holm oak glastanen gork = cork oak
Middle Breton (Brezonec)	glastann(enn) = holm oak(s)
Breton (Brezhoneg)	tann [tānː] = sessile oaks tannañ = to tan glastann = holm oaks

Note: the Welsh words were borrowed from English tanner, which ultimately comes from Proto-Celtic *tannos, via French, Latin and Gaulish.

Etymology: from Proto-Celtic *(s)tannos, the Proto-Indo-European *(s)dʰnwos/*(s)dʰonu (fir). Words from the same Proto-Celtic roots, via Gaulish and Latin tannum (oak bark), include tan (pulped oak bark used in the tanning process of leather) in French, tano (stem, slip) in Galician, tanería (tannery), Tannenbaum (fir tree, Christmas tree) in German, θάμνος (thámnos – bush) in Greek, and tan, tannery, tannin (tannic acid) in English.

Words from the same PIE roots include thanë (cranberry bush) in Albanian, and धनु (dhanu – bow) in Sanskrit. [source].

Hills

12th May 201928th October 2023 By Simon

Words for hill and related words in Celtic languages.

Proto-Celtic	*ardwos = high
Gaulish	Arduenna = place name
Old Irish (Goídelc)	ard [ar͈d] = high, height
Middle Irish (Gaoidhealg)	ard, árd = high above ground, elevated, lofty, tall, noble, great, proud, arduous, high place, height ardach = hilly ardae, airde = height, high place, nobility, loudness ardaid = to rise ardaigid = to raise, magnify, exalt ardán = pride, arrogance ardri = high king
Irish (Gaeilge)	ard [ɑːɾˠd̪ˠ/æːɾˠd̪ˠ] = height, hillock, top, high part, elevation, head, rise, ascent ardaigh = to raise, elevate, ascend, carry ardaitheoir = lift, elevator na farraigí arda = the high seas sála arda = high heels Ard-Aifreann = High Mass Ard-Aighne = Attorney-General ardaingeal = archangel
Scottish Gaelic (Gàidhlig)	àrd [aːr̪ˠd] = high, lofy, tall, great, loud, chief, eminent, superior, supreme àrd-bheinn = pinnacle
Manx (Gaelg)	ard [ø(r)d] = high, towering, tall, big, loud, height, high place, fell, incline
Proto-Brythonic	*arð = high
Middle Welsh (Kymraec)	ard, art = hill
Welsh (Cymraeg)	ardd [arð/aːrð] = hill, highland, top, high, upland
Middle Cornish (Cernewec)	ard = high, lofty
Cornish (Kernewek)	ardh = height, high place
Breton (Brezhoneg)	arz = high, elevated, lofty

Etymology: from the Proto-Indo-European *h₃r̥dʰwós, from *h₃erdʰ- (to increase, grow, upright, high) [source], which is also the root of the Latin word arbor (tree) and words for tree in Romance languages [source].

Proto-Celtic	*knokkos = protuberance, hill
Old Irish (Goídelc)	cnocc [knok] = hill, lump, swelling cnoccach [ˈknokax] = hilly, lumpy cnocán [ˈknokaːn] = little lump, mound, hill
Middle Irish (Gaoidhealg)	cnocc = lump, protruberance, hill, mound cnoccach, cnocach = lumpy, hilly cnoccán, cnocán = little lump, mound, hill
Irish (Gaeilge)	cnoc [kn̪ˠɔk / kn̪ˠʊk/ kɾˠʊk] = hill, mount cnocach = hilly cnocadóir = hillman, hillclimber cnocadóireacht = hill-climbing cnocán = hillock, heap cnocánach = hilly, uneven
Scottish Gaelic (Gàidhlig)	cnoc [krɔ̃xg] = hill, small hill, hillock, knoll, chilblain cnocach [krɔ̃xgəx] = hilly, rugged, abrupt cnocaireachd [krɔ̃xgɛrʲəxg] = rough hill walking, pacing cnocan [krɔ̃xgan] = hillock, ball of fibre
Manx (Gaelg)	cronk = mount, tor, hill, crongan = mound, small hill, tuffet, tumulus, hillock cronkan = knoll, small hill, hillock
Proto-Brythonic	*knox = hill, mound
Middle Welsh (Kymraec)	cnwch = swelling, protuberance, thickness, hump
Welsh (Cymraeg)	cnwc = hillock, knoll; swelling, tumour, lump, knob, hump cnocell = hillock, knoll
Old Breton	cnoch = hill
Middle Breton	qnech, knech, crech, cre(a)c’h = high, height, mountain, hill krec’hennek full of hills krec’hiek = steep, sloping, incluned
Breton (Brezhoneg)	krec’h = height, eminence, mound

Etymology: from the Proto-Indo-European *kneg- (back of the head, nape, neck). The English word neck, and related words in other Germanic languages, come from the same root [source].

Proto-Celtic	*brusnyos = hill
Old Irish (Goídelc)	bruinne = breast(s), bosom, chest; womb
Middle Irish (Gaoidhealg)	bruinne, bruinde = breast, bosom, chest
Irish (Gaeilge)	broinne = breast, bosom; brink, verge
Scottish Gaelic (Gàidhlig)	broinne [brɤin̪ʲ] = belly, stomach; womb; bulge
Manx (Gaelg)	brein = womb
Proto-Brythonic	*bronnā = breast
Middle Welsh (Kymraec)	bronn, bron = breast, bosom
Welsh (Cymraeg)	bron [brɔn] = breast, bosom, thorax, hill-side, slope, breast (of hill) bronallt, broniallt = gentle slope of hill, rising ground, wooded slope bryn = hill, mount, rise, bank; heap, mound; prominence, highness
Middle Cornish (Cernewec)	bron = a round protuberance, breast, pap, slope of a hill
Cornish (Kernewek)	bronn / brodn [brɔn: / brɔdn] = breast, hill
Middle Breton (Brezonec)	bron, bronn = breast, bossom, udder bronnañ, bronnat, bronniñ = to breast feed
Breton (Brezhoneg)	bronn [ˈbrɔ̃n] = breast

Etymology: from Proto-Celtic *brusū (belly, abdomen, breast), possibly from the Proto-Indo-European *bʰrews- (belly, to swell) [source].

Words from the same Proto-Celtic root, via the Proto-West-Germanic *brunnjā (chainmail shirt), include: brynja (coat of mail) in Icelandic, Swedish and Faroese, brynje (mail, armour) in Danish, brynje (coat of armour, protective clothing for motorcyclists) in Norwegian, and броня [brɔˈnʲa] (armour, armoured vehicle, shell) in Ukrainian [source].

The English words breast, brisket and bruise come from the same PIE root, as do borst (chest, thorax, breast) in Dutch, Brust (chest, breast, bosom) in German, and bröst (breast, chest, thorax) in Swedish [source].

Proto-Celtic	brixs / brig- = hill
Gaulish	*brignā, -brigā = hill
Old Irish (Goídelc)	brí [bʲrʲiː] = hill
Middle Irish (Gaoidhealg)	brí, bri = hill
Irish (Gaeilge)	brí = brae, hill
Scottish Gaelic (Gàidhlig)	bre = hill, headland
Proto-Brythonic	*breɣ [ˈbrɛːɣ] = hill
Welsh (Cymraeg)	bre = hill, hillock, mountain, hill-country, upland, peak
Middle Cornish (Cernewec)	bre = mountain, hill
Cornish (Kernewek)	bre [brɛ: / bre:] = hill – appears as Bray or Brae in placenames
Middle Breton (Brezonec)	bre = hill
Breton (Brezhoneg)	bre = hill, mountain

Etymology: from the Proto-Indo-European *bʰerǵʰ- (high) [source].

The Spanish word breña (scrub, brush, rough ground), the Portuguese word brenha (scrub, complication, confusion) come from the Gaulish *brignā, via the Vulgar Latin *brigna (rocky terrain) [source].

From the same PIE root we get the English words burrow and borough, and words in placenames such as burg, burgh and bury, and also the German Burg (castle), the Danish borg (castle, stronghold), and related words in other Germanic languages.

Proto-Celtic	*krowko- = heap
Old Irish (Goídelc)	crúach = stack, mountain, hill
Middle Irish (Gaoidhealg)	crúach,cruach = stack of corn, rick, heap, conical pile crúachad = act of stacking, piling up crúachán = small rick, hill crúachda = swollen, piled up
Irish (Gaeilge)	cruach [kɾˠuəx] = stack, rick, pile, (mountain) stack cruachach = full of stacks cruachadóir = stack-builder cruachadóireacht = (act of) building stacks cruachán = (small) stack; person of stunned growth cruachóg = heap
Scottish Gaelic (Gàidhlig)	cruach [kruəx] = pile, stack; round hill; clamp (stack) cho seasgair ri luchag ann an cruach = as snug as a bug in a rug (“as snug as a mouse in a haystack”) cruach-fheòir = haystack cruach-mhòna, cruach mònach = peat-stack cruach-sheangan = anthill
Manx (Gaelg)	creagh = stack, furrow creagh fendeilagh = barricade creagh hraagh = haystack
Middle Welsh (Kymraec)	krug, gruc, grvg = hillock
Welsh (Cymraeg)	crug = hillock, knoll, cairn, tumulus, heap, mass, stack, group, company, multitude; pustule, abscess, boil, carbuncle
Old Cornish	cruc = hillock
Middle Cornish (Cernewec)	cruc, cruk, crŷc = hillock, mound, barrow
Cornish (Kernewek)	krug = mound, tumulus
Old Breton	cruc = hillock
Middle Breton (Brezonec)	krug = pile, heap krugell = pile, heap, hillock, mound, tumulus
Breton (Brezhoneg)	krug = mound krugell = hillock, tumulus

Etymology: possibly from the Proto-Indo-European *krā(u)- (to heap up) [source].

Proto-Celtic	*tumbo- = excrescence hill
Old Irish (Goídelc)	tom = bush, tuft, hillock, knoll
Middle Irish (Gaoidhealg)	tom = bush, tuft, hillock, knoll
Irish (Gaeilge)	tom [t̪ˠɑumˠ/t̪ˠʌmˠ] = bush, shrub tomach = bushy, tufted tomachán = small tuft
Scottish Gaelic (Gàidhlig)	tom [tɔum] = hillock, knoll, mound, clump, heap, tuft toman [toman] = small hillock tomag [tomag] = small hillock/knoll/mound, small clump, small heap
Manx (Gaelg)	tom = tussock
Middle Welsh (Kymraec)	tom, tomm = dung(hill), manure, compost, dirt, muck
Welsh (Cymraeg)	tom = dung(hill), manure, compost, dirt, muck, mud, mound, heap

Etymology: possibly from the Proto-Indo-European *tewh₂- (to swell), and cognate with the English word tumulus.

Words marked with a * are reconstructions.

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, eDIL – Electronic Dictionary of the Irish Language, In Dúil Bélrai English – Old Irish glossary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionaire Favereau, TermOfis, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Land, Parishes & Enclosures

23rd April 201927th July 2024 By Simon

Words for land, parish, enclosure and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	*landā = (open) land
Gaulish	landa = land
Old Irish (Goídelc)	land, lann = building, house, land, plot, plate
Middle Irish (Gaoidhealg)	land, lann = building, house, land, plot, plate íarlann = pantry ithlann, ithla = threshing floor, barn, granary, storehouse; garden, orchard
Irish (Gaeilge)	lann = land, ground, plot, house, building (especially a church) bialann = canteen, restaurant leabharlann = library longlann = dockyard réadlann = observatory saotharlann = laboratory
Scottish Gaelic (Gàidhlig)	lann [l̪ˠaun̪ˠ ~ l̪ˠan̪ˠən] = enclosure, enclosed area, precinct; repository; house, church amharc-lann = observatory biadh-lann = canteen, dinning hall, refectory broc-lann = badger’s den, sett long-lann = dockyard fasg-lann = shelter lann-eaglaise = church precinct leabhar-lann = library obair-lann = laboratory suin-lann = dormitory ur-lann = esplanade, green
Manx (Gaelg)	lann = enclosure, habitation lhonglann = dockyard lioarlann = library seyrlann = laboratory reayrtlann = observatory
Proto-Brythonic	*llann [ˈl͈anː] = land, area, plot, sacred place, churchyard
Middle Welsh (Kymraec)	lánn, lann, lan, llann = land lannerch, llanerch, llennyrch = a clearing, glade
Welsh (Cymraeg)	llan [ɬan] = (parish) church, monastery, heaven, churchyard llan gadeiriol = cathedral llan (y) gwyryfon = nunnery llan y plwyf = parish chuch llandref = village, small town, church village llandy = parsonnage, glebe-house llangeidwad = churchwarden llanaidd = glade-like, open, clear; ecclesiastical, (of a) church llannerch = a clearing, glade, oasis, pasture, court, empty space, patch, place, area
Middle Cornish (Cernewec)	lan = a church, an inclosure, yard, church-yard lanherch = glade
Cornish (Kernewek)	lann [lan:] = yard lannergh = glade
Old Breton (Brethonoc)	lann = moor, heath, moorland
Middle Breton (Brezonec)	lann = moor, heath, moorland lanneg, lannek, lannell = land covered with moor landonenn = swath lann = monastery, church
Breton (Brezhoneg)	lann [ˈlãnː] = moor, heath, moorland lanneg = land covered with moor

Etymology: from the Proto-Indo-European *lendʰ- (land, heath) [source].

Words from the same Proto-Celtic root, via Gaulish and Latin, include lande (moor, moorland, heath) in French, landa (a (sandy) plain) in Spanish, landa (country, field, piece of land) in Basque [source].

The (archaic) English word laund [lɔːnd] (a grassy plain or pasture, especially surround by woodland; a glade) possibly comes from the same Proto-Celtic root, via Middle English, Old French and Gaulish, or from the Proto-Germanic *landą (land), which comes from the same PIE root [Source].

Words from the same PIE roots include land and lawn in English, land (land, country) in Dutch, Land (country, state, province, land) in German, land (land, country, nation, state, ground, earth) in Swedish, land (country, land) in Danish, lado (uncultivated, wild land) in Czech, and ледина [ˈlɛdina] (untilled land) in Macedonian [source].

Proto-Brythonic	*pluɨβ = countryside, parish, common people, parishoners
Middle Welsh (Kymraec)	plwyf, plwy = parish, parishioners, people plwyvog = parishioner, parochial plwyfol = parochial, lawfully settled in a parish
Welsh (Cymraeg)	plwy(f) [pluːɨ̯(v) / plʊi̯(v)] = parish, poor relief, parishioners, people plwyfo = to settle in a parish plwyfog = parishioner, parochial plwyfol = parochial, lawfully settled in a parish plwyfoldeb = parochialism
Old Cornish	plui = parish
Middle Cornish (Cernewec)	plew, plui, plu = parish
Cornish (Kernewek)	pluw = parish pluwek = parishioner (m), parochial pluwoges = parishioner (f)
Old Breton (Brethonoc)	pluiu, plueu, ploeu, ploi, ploe = country, countryside
Middle Breton (Brezonec)	ploeou, ploe, ploé = country, countryside plouisyen = peasant, rural
Breton (Brezhoneg)	ploue [pluːe] = parish (historical – appears in placenames), countryside (literary) plouead = country, earthy plouezad = peasant, rural plouk [pluːk] = yokel

Etymology: from Latin plēb(ē)s (common people, plebians), from Old Latin plēbēs, from Proto-Italic *plēðwēs Proto-Indo-European *pl̥h₁dʰwḗh₁s ~ *pl̥h₁dʰuh₁és, from *pleh₁- (fill) [source].

The French word plouc [pluk] (hick, country bumpkin, yokel) was borrowed from Breton plouk in the late 19th century [source].

Other words from the same roots include fill, folk, pleb (a commoner, a common, unsophisticated, cultureless person), plenty, plural, plus and public in English [source].

Middle Irish (Gaoidhealg)	parráiste = parish pairche = parish, diocese
Irish (Gaeilge)	paróiste [ˈpˠaɾˠæʃtʲə] = parish paróisteach = parishioner, presentable person, parochial paróisteachas = parochialism
Scottish Gaelic (Gàidhlig)	parasite [parɪʃdʲə] = parish eaglais parasite = parish church neach-parasite = parishioner

Etymology: from Anglo-Norman paroche (parish), from Late Latin parochia (parish), from Ancient Greek παροικίᾱ (paroikíā – a dwelling abroad), from πάροικος (pároikos – neighboring, foreigner), from παρά (pará, beside) + οἶκος (oîkos – house). [source].

Scottish Gaelic (Gàidhlig)	sgìre [sgiːrʲə] = district, parish sgìreachd [sgʲiːrʲəxg] = parish
Manx (Gaelg)	skeerey = parish skeeragh = parochial skylley = parish

Etymology: from Old English sċīr (office, district, region, shire), from Proto-West Germanic *skīru (office, district), from PIE *(s)ker- (to cut). The English word shire comes from the same roots [source].

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, eDIL – Electronic Dictionary of the Irish Language, In Dúil Bélrai English – Old Irish glossary, An Etymological Dictionary of the Gaelic Language, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionaire Favereau, TermOfis, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Castles & fortresses

18th April 201930th March 2024 By Simon

Words for castles and fortresses in Celtic languages.

Proto-Celtic	*dūnom = stronghold
Old Irish (Goídelc)	dún [duːn] = fort, fortress
Irish (Gaeilge)	dún [d̪ˠuːnˠ] = fort; fortress; place of refuge, haven; residence, house; promontory fort; bluff
Scottish Gaelic (Gàidhlig)	dùn [duːn] = fortress, heap
Manx (Gaelg)	doon [duːn] = fort, fastness, stronghold, bastion, earth fort, dun, fortified rock
Proto-Brythonic	*din [ˈdiːn] = hill, fortified hill, fort
Gaulish	*dunum, dūnom** = fort
Middle Welsh (Kymraec)	din = fort
Welsh (Cymraeg)	din [dɪn / ˈdiːn] = city, fort, fortress, fastness, stronghold dinas [ˈdɪnas / ˈdiːnas] = city, large town; town
Cornish (Kernewek)	din [di:n] = fort dinas [‘dinas / ‘dinɐz ] = fort
Old Breton	din = fort, fortress
Breton (Brezhoneg)	din [dĩːn] = fort, fortress (archaic) dinas = bastion, stronghold

Note: apart from dinas in Welsh, these words are mostly found in placenames, such as Dún Dealgan (Dundalk) in Ireland, Dún Dè(agh) (Dundee) in Scotland, Dinbych (Denbigh) in Wales, Dinmeur (Dunmere) in Cornwall, and Dinan in Brittany.

Etymology: from the Proto-Indo-European *dʰuHnom (enclosure), from *dʰewh₂- (to finish, come full circle) [source]. The English words down (a (chalk) hill, rolling grassland), dune and town possibly come from the Proto-Celtic *dūnom [source].

Proto-Celtic	katrixs / katrik- / *kassrik- = fortification, fort
Old Irish (Goídelc)	ca(i)thir [ˈkaθərʲ] = stone enclosure, fortress, castle; dwelling; monastic settlement, enclosure; monastery, convent; fortified city, city
Irish (Gaeilge)	cathair [ˈkahɪɾʲ/kaːɾʲ] = city; enclosed church establishment, monastic city; circular stone fort; dwelling (place), bed, lair Cathair an Phápa = Vatican City cathair chorr = round fort cathair ghríobháin = maze, labyrinth cathróir = citizen cathróireacht = citizenship ardchathair, príomhchathair = capital city, metropolis
Scottish Gaelic (Gàidhlig)	cathair [kahɪrʲ] = city cathair-bhaile = city (with city status) cathair-stàit = city state
Manx (Gaelg)	caayr = dwelling place, city

Etymology: unknown. Possibly related to the Old English hēaþor (enclosure, prison) or Serbo-Croatian kȍtar ( country, district) [source].

Proto-Celtic	*kagrom = fort
Welsh (Cymraeg)	caer [kaːɨ̯r / kai̯r] = fort, fortress, enclosed stronghold, castle, citadel, fortified town or city; wall, rampart, bulwark
Cornish (Kernewek)	ker [kɛ:r / ke:r] = fort, fortress, hill fort, city
Breton (Brezhoneg)	ker = town, village, villa

Etymology: from the Proto-Celtic *kagyom (pen, enclosure), from the Proto-Indo-European *kagʰyóm (enclosure, hedge) [source], which is also the root of words for hedge in Germanic languages, such as hedge in English, Hecke (hedge) in German and hæk (hedge, hurdle) in Danish [source].

Words marked with a * are reconstructions.

Old Irish (Goídelc)	caisel = fort, castle
Irish (Gaeilge)	caiseal = (ancient) stone fort; unmortared stone wall; boundary wall (of church or cemetery); caslte (in chess); spinning top caisleán [kəˈʃlʲɑːn̪ˠ / ˈkaʃl̠ʲɑːnˠ / ˈkaʃl̠ʲænˠ] = castle, mansion, cumulus (cloud)
Scottish Gaelic (Gàidhlig)	caisteal [kaʃdʲəlˠ] = castle, fort, tower, garrison; turreted mansion
Manx (Gaelg)	cashtal = castle, citadel, surrounding wall, bulwark, rook
Welsh (Cymraeg)	castell [ˈkʰastɛɬ / ˈkʰastɛɬ] = castle, stronghold; castellated mansion; a kind of cloud; fortified town or city; village
Cornish (Kernewek)	kastel = castle, hill fort
Breton (Brezhoneg)	kastell = castle, fort, fortress

Etymology: from the Latin castellum (castle, fort, citadel, fortress, stronghold), a diminutive of castrum (fort) [source], from the Proto-Indo-European *ḱes- (to cut, cut off, separate) [source], which is also the root of words for castle in most European languages.

Proto-Celtic	frāti- = fort, rampart rāti- = a dugout, a digging
Gaulish	ratin = appears in place names
Old Irish (Goídelc)	ráth [r͈aːθ] = earthen rampart surrounding a chief’s residence, fort, rath
Irish (Gaeilge)	ráth [ɾˠɑː/ɾˠaːx] = earthen rampart, earthen ring-fort, rath, layer (of thatch) ráthach = having earthen forts ráth sneachta = snow-drift
Scottish Gaelic (Gàidhlig)	ràth [r̪ˠaː] = (ancient) fortress, mound, (ancient) royal seat; clearing, cleared swathe of land; fortress, barrow, village, town
Manx (Gaelg)	raah = rath, ring-fort
Middle Welsh (Kymraec)	bedd-rawd = cemetery
Welsh (Cymraeg)	beddrod = tomb, vault, grave, cemetery
Middle Breton	bez-ret = cemetery
Middle Breton	bered = cemetery

Etymology: from the Proto-Indo-European *prehzt-i- (field). Possibly cognate with the Latin prātum (meadow) [source].

Middle Welsh (Kymraec)	kyvelchy, gyuyllchi = circular fortress
Welsh (Cymraeg)	cyfylchi = a kind of circular stronghold or fortress

Etymology: from cyfwlch (complete, entire, perfect, excellent). Found only in the placenames such as Dwygyfylchi [dʊɨɡəˈvəlχi], a village in Conwy county, which was first recorded as Dwykyvelchy in 1287 [source]. There is also Gyfylchi in the Afan Valley in Neath Port Talbot county [source].

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, eDIL – Electronic Dictionary of the Irish Language, In Dúil Bélrai English – Old Irish glossary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionaire Favereau, TermOfis, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Towns and Tribes

15th April 201910th March 2023 By Simon

Words for dwelling, settlement, town, tribe and related things in Celtic languages.

Proto-Celtic	*trebā = dwelling
Gaulish	Atrebates = name of a tribe
Old Irish (Goídelc)	treb = house, farm; household; tribe
Middle Irish (Gaoidhealg)	treb = house, farm; household; tribe
Irish (Gaeilge)	treibh [ˈtʲɾʲɛv] = house, homestead, farmstead; household, family; tribe, race
Scottish Gaelic (Gàidhlig)	treabh [tro] = farming village treubh [treːv] = tribe
Proto-Brythonic	*treβ [ˈtrɛːβ] = town, settlement
Middle Welsh (Kymraec)	tref [ˈtrɛːβ] = town, settlement trefad, trevad, treuad, treuat = dwelling(-place), habitation trefan, treuan = small town or city, village, dwelling, abode, manor-house, fort
Welsh (Cymraeg)	tre(f) [treː(v)] = town; town centre; dwelling(-place), habitation, residence, home; house (and surrounding land), homestead, farm, estate, cluster of houses; township; tribe trefad = dwelling(-place), habitation, residence, home, region, domain trefaf, trefu= to dwell, live, settle trefan = small town or city, village, dwelling, abode, manor-house, fort
Middle Cornish (Cernewec)	tre, trev = dwelling place, homestead, home, town tregva, trigva = dwelling place, habitation trevedic = one from a country village, a country man, rustic
Cornish (Kernewek)	tre [trɛ:/tre:] = farmstead, home, town, village trigva = abode, address, dwelling, resdidence trigys = settled, to reside, live
Old Breton	treff, treb = town, settlement
Middle Breton (Brezonec)	tre, trev = town
Breton (Brezhoneg)	trev = town trevour = civil

Etymology: From the Proto-Indo-European *treb- (dwelling, settlement) [source].

Words from the same Proto-Celtic root (via Latin) possibly include trobo (beehive, skep) in Galician, and truébanu (beehive, barrel, basket) in Asturian [source].

This is also the root of the archaic English word thorp(e) (a group of houses standing together in the country; a hamlet; a village), which appears in place names such as Milnthorpe and Scunthorpe.

Related words in other languages include Dorf (hamlet, village, town) in German, torp (village) in Danish, torp (farm, cottage, croft) in Swedish, þorp (village, farm) in Icelandic, and trevë (country, region, village) in Albanian [source].

Words marked with a * are reconstructions.

Trees, Wood(s) & Forests

25th December 201815th September 2023 By Simon

Words for tree, wood and related things in Celtic languages.

There are various words for tree in the modern Celtic languages. In each language the usual word for tree is different and comes from different roots. Only the Cornish and Breton words are cognate. The usual words for tree are: crann (Irish), craobh (Scottish Gaelic), billey (Manx), coeden (Welsh), gwedhen (Cornish) and gwezenn (Breton).

Proto-Celtic	*kʷresnom = tree, wood
Old Irish (Goídelc)	crann = tree crannchor = casting of lots crannda = wooden
Middle Irish (Gaoidhealg)	crann, crand = tree, wood, timber, staff, pole, plank, beam, spearshaft, mast, steering oar, lot, destiny, fate crannach, cranncha = trees, grove, wooded place crannaige, crannaigi = shaft-trimmer, spearsman crannaigid = to cast lots crannán = small spearshaft crannchor, crannchur = casting of lots crannda, cranda = wooden, made of wood, wooded cranngal, crannghal = timber, wooden structure or object, spear (shaft) crannóc, crandoc = wooden structure, wooden drinking-container; basket, wooden lake-dwelling cranntáball = sling, staff-sling
Irish (Gaeilge)	crann [kɾˠaun̪ˠ / kɾˠan̪ˠ] = tree; mast, boom, pole; stock, handle; shaft, beam; stick crannach = stake-fence, forest of spears, arboreal, wooded crannadóir = arboriculturist, tree-climber crannadóireacht = arboriculture, tree-climbing crannail = timbering, timbers, lattice-work, ship’s masts crannán = wooden shaft, handle, wooden vessel, hardening stand (for bread) crannchur = casting of lots, sweepstake, lottery crannlach = brushwood, (withered) stalks, haulm crannmhar = full of trees, timbered, wooded crannóg = piece of wood, pole, wooden frame crannúil = tree-like, arborescent
Scottish Gaelic (Gàidhlig)	crann [kraun̪ˠ] = mast; plough; beam; lot (in drawing lots); tree (archaic) cranntair = wooden peg/pin crannghail = wooden frame crannach = pertaining to or abounding in masts, ploughs, beams, trees etc crannchur = destiny, lot, draw, lottery crannag = pulpit, crannog, island dun, crosstree crannlach = brushwood, lanky wood, dummy
Manx (Gaelg)	croan = boom, mast, flag pole creenagh = brushwood, wither crannag = dock, heap, desk, pulpit, rostrum, lookout
Gaulish	prenne = big tree
Proto-Brythonic	prenn [ˈprenː] = wood, tree
Middle Welsh (Kymraec)	pren, prenn = tree, bush, timber, wood prenvol, prenuol, prennol = (wooden) box, chest, coffer
Welsh (Cymraeg)	pren [prɛn] = tree, bush, shrub; timber, wood, wooden; piece of wood, wooden stick; cross, gallows, gibbet prenfol = (wooden) box, chest, coffer, case, coffin preniaf, prennaf, prenio, prennu = to bolt (a door), bar, shut (sb) out prensaer = carpenter
Old Cornish	pren = wood
Middle Cornish (Cernewec)	pren = tree, wood, timber, a piece of wood, a lot prenic = wooden, woody prenne = to fasten with a piece of wood, to bar prennyer = pieces of wood
Cornish (Kernewek)	prenn [prɛn:] = bar, beam, log, timber, (gambling) lot , wooden prenna, predna = to bar, lock prennek = wooden, woody prennlown = plywood prennweyth = woodwork
Old Breton	pren = wood
Middle Breton (Brezonec)	pren, prenn, preen = wood prennaff, prena, prenna = to close, block prennet = to lock
Breton (Brezhoneg)	prenn = wood, piece of wood, fastner prennañ = to close, fasten, shut

Etymology: from Proto-Indo-European *kʷres (bush, thicket) [source]. Words from the same roots include hurst (wood, grove – used in placenames, e.g. Lyndhurst) in English, and Horst (eyrie, bush, thicket, small forest) in German [source]

Old Irish (Goídelc)	cráeb / cróeb = tree
Middle Irish (Gaoidhealg)	cráeb, craib = branch, bough, sprig, rod, wand, post, tree, bush cráebach, cræbacha = having branches, branchy, branches
Irish (Gaeilge)	craobh = branch, bough; tree craobhach = branches, branched, branching, flowing, spreading craobhaigh = to branch, ramify, expand, spread craobhóg = small branch, twig, sprig, spray, darling
Scottish Gaelic (Gàidhlig)	craobh [krɯːv] = tree, bush craobhaich = woody, wooded, full of trees, branching, spreading craobhag [krɯːvag] = small tree craobhadair [krɯːvədɪrʲ] = arborist, tree specialist
Manx (Gaelg)	crouw = stock, bush, dwarf tree, stick, bunch, wide spreading tree, tributary of river

Etymology: unknown, possibly from Proto-Celtic krētros (sieve) [source].

Proto-Celtic	*belyom = tree
Gaulish	*bilia [ˈbi.liaː] = tall tree
Old Irish (Goídelc)	bile [ˈbʲilʲe] = tree, especially a large, ancient, sacred one
Middle Irish (Gaoidhealg)	bile [ˈbʲilʲe] = (large) tree (esp. an ancient and venerated one), tree trunk, mast, scion, hero bilech = abounding in trees, (well-)wooded bileóc, biléog = leaf, leaflet
Irish (Gaeilge)	bile [ˈbʲɪlʲə] = (large, sacred) tree; scion; distinguished person bileog = leaf, letter of freedom (to marry) bileogach = leafy, laminated biliúil = tree-like, stately
Scottish Gaelic (Gàidhlig)	bile [bilə] = mast; plough; beam; lot (in drawing lots); tree (archaic); cluster of trees, sacred tree/grove bileach = leaf, amount of leaves, leafy tree bileag = blade (of vegetation), board, leaf, leaflet, pamphlet, ticket, label, slip (of paper) bileagach = lipped, billed, bladed, fringed, edged
Manx (Gaelg)	billey = tree, big bush billagh = tree, wooded, woody biljagh = arboreal, wooded billey
Middle Welsh (Kymraec)	bill, pill = (tree) trunk, stock, log, branch; fortress billwydd = kindling, firewood, sticks, brushwood; joists, laths
Welsh (Cymraeg)	pill [pɪɬ] = (tree) trunk, stock, log, branch, pole, stake, post; fortress, castle, stronghold, refuge, sanctuary, safety, strength, force; snatch of song, verse; still, crib; socket pillwydd = kindling, firewood, sticks, brushwood; joists, laths pillyn = peg
Middle Breton (Brezonec)	bilh, bill = a felled tree trunk, log, lumber, timber bilh-koad = chunk of wood
Breton (Brezhoneg)	bill = trunk

Etymology: from Proto-Indo-European *bʰolh₃yo- (leaf), from *bʰleh₃- (blossom, flower) [source]. Words from the same Proto-Celtic root, via Gaulish, include bille (tree trunk, railway sleeper, rolling pin) and billon (a ridge in a ploughed field) in French, bilha (stem, trunk) in Provençal and possibly billa (spigot, faucet, stick) in Galician [source].

Words from the same PIE roots include folio and phyllo / fil(l)o (pastry), phyllomancy (diviniation by leaves) in English, feuille (leaf, sheet) in French, andhoja (leaf, petal, blade) in Spanish [source].

Proto-Celtic	*widus = wood, trees
Old Irish (Goídelc)	fid = tree, wood, letter in Ogham fidchell = a boardgame similar to chess fidrad = trees, a wood
Middle Irish (Gaoidhealg)	fid = tree, wood, timber fidach = wooded, abounding in trees, timber fidchell = a boardgame similar to chess fidrad = trees, a wood, letter (in Oghan)
Irish (Gaeilge)	fiodh = tree, wood, timber fiodhach = abounding in trees, wooded fiodhneimheadh = sacred grove fiodhradh = trees, timbers, letters (literary) ficheall = chess, chess board
Scottish Gaelic (Gàidhlig)	fiodh [fjɤɣ] = wood, timber, wooden, made of wood fidhcheall = Celtic chess fiodhach [fjɤɣəx] = shrubbery, shrubs, cheese press; wooden, ligneous, woody fiodhan = cheese press fiodhrach [fjɤɣan] = timber
Manx (Gaelg)	fuygh = timber, wood fuyghagh, fuyghoil = ligneous, wooden, woody fuyghee = wooden feeal = chess
Proto-Brythonic	*gwɨð [ˈɡwɨːð] = wood, trees
Old Welsh	guid = tree
Middle Welsh (Kymraec)	guit, guyt, gwyd, gwŷdd = tree(s), forest, woods gvytbuil, gvydbvll = a chess-like boardgame guduit, gwyddfid, gwytuid, gwituid = wood, forest, bush, protective hedge
Welsh (Cymraeg)	gwŷdd [ɡwɨːð / ɡwiːð] = tree(s), branches, twigs; forest, woods, shrub(s); lineage, genealogical tree, stock; stem gwyddallt = wooded slope gwyddbwyll = chess; knowledge, learning, science, reason gwyddel = forest, grove, thicket, brake, wilderness gwyddfid = wood, forest, bush, protective hedge
Old Cornish	guit = trees
Middle Cornish (Cernewec)	gwedh, gweydh, gwydh = trees gwedhen, gwedhan = tree gwydhbol = chess
Cornish (Kernewek)	gwydh [gwɪ:ð] = trees gwedhen = tree gwedhek = woodland gwedhlan = arboretum, tree plantation
Old Breton	guid = trees
Middle Breton (Brezonec)	guez, guid, gwyd, gwydh = tree(s)
Breton (Brezhoneg)	gwez [ɡwe] = trees gwezenn = tree gwezeg = wooded gwezek = abounding in trees gwezboell = chess

Etymology: from Proto-Indo-European *h₁weydʰh₁-. (tree, beam) [source]. Words from the same roots include wood in English, vid (firewood, wood) in Swedish, and ved (wood) in Danish [source].

Proto-Celtic	*kaitos = wood, forest
Proto-Brythonic	koɨd [ˈkoɨ̯d] = wood, forest argoɨd = surrounding forest
Old Welsh	coit = wood, forest coetlann = copse, grove, woodland, wooded glade
Middle Welsh (Kymraec)	coyt, coit, koet, coet, coed = forest, wood, trees coedallt = wooded slope, hillside coedva, koedfa = grove, woodland, forest koedach = shrubs, brushwood coydiawc, coedawc, coedoc = woody, wooded coydiawl, koedolyon = silvan, rustic, wild coet, coedwig, coedwic = forest, wood
Welsh (Cymraeg)	coed [koːɨ̯d / kɔi̯d] = forest, wood, trees; shrubs; timber, pieces of wood coeden [koːɨ̯d / kɔi̯d] = tree coedaidd = silvan, arboraceous, woody, wooden coedallt = wooded slope, hillside coedfa = grove, woodland, forest coed(i)ach = shrubs, brushwood, underwood, withered branches coed(i)af), coed(i)o = to prop or timber a pit or shaft coed(i)og = woody, wooded, abounding with trees, silvan coed(i)ol = pertaining to wood or timber, silvan, rustic, wild coedlan = copse, grove, woodland, wooded glade coedwig = forest, wood argoed = trees, forest, surrounding forest
Old Cornish	cuit = wood, forest
Middle Cornish (Cernewec)	coys, coyd, coid = wood, forest
Cornish (Kernewek)	koos [ko:z / ku:z] = forest
Middle Breton (Brezonec)	coat, coet, coët = wood, forest
Breton (Brezhoneg)	koad [ˈkwɑːt] = wood, forest koadadur = afforestation, tree planting koadaj = panelling, woodwork koadeg = wooded, woody koader = to timber, panel, plant trees argoad = groove, copse, wooded

Etymology: from Proto-Indo-European *kayt-/*ḱayt- (forest, wasteland, pasture) [source]. Words from the same roots include heath and heather in English, Heide (heath, heathland, woodland, forest) in German, hed (moor, waste land) in Swedish.

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, eDIL – Electronic Dictionary of the Irish Language, In Dúil Bélrai English – Old Irish glossary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionaire Favereau, TermOfis, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Celtiadur

Exploring connections between Celtic languages

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Trees, Wood(s) & Forests