Thousands

5th February 2026 By Simon

Words for thousand, mile and related things in Celtic languages.

Thousands

Words marked with a * are reconstructions.

Proto-Celtic	*mīlom = thousand
Old Irish (Goídelc)	míle [ˈmʲiː.lʲe] = thousand mílmad [ˈmʲiːlβ̃ə(ɣ)] = thousandth
Middle Irish (Gaoidhealg)	míle, míli = a thousand, a mile, a millennium mílmad = thousandth
Irish (Gaeilge)	míle = thousand, mile míliú = thousandth míleáiste = mileage mílechosach = millepede mílemhéadar = milometer
Scottish Gaelic (Gàidhlig)	mìle [miːlə] = thousand, mile mìleamh [miːləv] = thousandth (part) mìle-chasach [miːlə xasəx] = milipede
Manx (Gaelg)	milley = thousand meeiley = thousand, furlong millioo = thousandth
Proto-Brythonic	*mil [ˈmiːl] = thousand
Middle Welsh (Kymraec)	myl, mil = thousand milvuet, miled = thousandth mil fil = million, host, multitude milltir, mylltyr = mile
Welsh (Cymraeg)	mil [miːl] = (a) thousand, a great number, host, millennium, by far, a thousand times (more) milfed (1000fed) = thousandth (part) milfil = million, host, multitude milflwydd = millennium, millenial milltir = mile
Middle Cornish (Cernewec / Kernuak)	mil, mŷl = a thousand mildir, myldyr = a mile milvilm mylvyl = a thousand thousand, a million milgweth, milwyth, milweth, mylwyth = a thousand times
Cornish (Kernewek)	mil [mil] = thousand milves (1000ves) = thousandth milblek = thousandfold milvil = million milvilwas, milvilvowes = millionaire mildam = jigsaw mildir = mile mildros = millipede milhyntal = maze milvledhen = millennium
Middle Breton (Brezonec)	mil = thousand miluet = thousandth
Breton (Brezhoneg)	mil [miːl] = thousand milvet (1000vet) [ˈmil.vet] = thousandth milved [ˈmil.vet] = millennium miltir [ˈmil.tir] = mile milendall [mi.lɛn.ˈdalː] = labyrinth, maze miltamm [ˈmil.tãm] = puzzle

Etymology: from Latin mīlia (thousands), from mīlle (thousand), from Proto-Italic *smīɣeslī (thousand), from PIE *smih₂ǵʰéslih₂ (having one thousand), *smih₂ (one) and *ǵʰéslom (heap). Words from the same roots include mile, millennium and million in English, Meile (mile) in German, mille (thousand, mile, bullseye) in French, and mil (thousand) in Spanish [source].

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, Geriafurch, TermOfis

Separation

28th January 2026 By Simon

Words for to separate, to split and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	*skarati = to separate, to divide
Old Irish (Goídelc)	scaraid = to part, to separate, to sever etar·scara = to separate, to depart etarscarthae = separated
Middle Irish (Gaoidhealg)	scarad, scarthain = act of separating, parting, departing, escaping scaraid, scart, scarad, scarthain = to separate, to part, to sever, to spread out, to unfold, to depart scarthach, scarthanach, sgartanach = separated, severed
Irish (Gaeilge)	scar [ˈskaɾˠ] = to part, separate, spread scaradh = separation, spreading scaradóir = spreader scartha = to separate scarúil = separative, separable scarúnaí = separatist
Scottish Gaelic (Gàidhlig)	sgar [sgar] = separate, divide, part, detach, sever, sunder, segregate sgarach [sgarəx] = separatist, schismatic, having cracks, fissures sgarachdach = separatist sgarachdainn [sgarəxgɪn̪ʲ] = (act of) separating, severing sgaradaiche [sgarədɪçə] = separatist sgaradair [sgarədɪrʲ] = separator, spacer
Manx (Gaelg)	scarr = to separate, to take away, parted, separated, divided scarrey = separation, disjunction, parting, secession, segregate, severence, spacing scarrey rish = to break away, part with, separate scarrit = detached, disconnected, parted, separated, spaced, sundry scarrt = parted, separated scart = apart, detached, disjoined, separate, divided, divorced
Proto-Brythonic	*ɨskarad = (?)
Middle Welsh (Kymraec)	ysgar, yscar = separating, dividing, separation, division, split ysgar, yscar = to separate, divide, part yscaredic, ysgaredig = divorced, separated, apart yscarieth = divorce, separation, divion, split, miscarriage
Welsh (Cymraeg)	ysgar [əsˈɡar] = separating, dividing, separation, division, split, divorce, leaving, (de)parting ysgaradwy = separable, divorceable (y)sgaraf, (y)sgaru = to separate, divide, part, divorce ysgaredig = divorced, separated, apart ysgariad, ysgariaeth = divorce, separation, divion, split, miscarriage
Middle Cornish (Cernewec / Kernuak)	squardhy, squardye, squerdyé = to tear, to rend, to break to pieces, to be torn, to be rent, to be broken to piece
Cornish (Kernewek)	skward = laceration, rent, rip, slit, tear skwardya = to rip, to tear keskar = separation
Old Breton (Brethonoc)	scarat = split, separation
Breton (Brezhoneg)	skarat = split, separation, crack skarad = scission skarata = to make scissors, to compromise

Etymology: from Proto-Indo-European *(s)kerH- (to cut off, sever, separate, divide) [source]. Words from the same roots include (to) shear, carrion, carnage in English, chair (flesh) in French, carne (flesh, meat) in Spanish, and skirti (to separate, distinguish, devote) in Lithuanian, harr (to weed (out), prune, rid) in Albanian [source].

Smoothly Slippery

14th January 202614th January 2026 By Simon

Words for slippery, smooth and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	slimnos, slimonos = smooth, slippery
Old Irish (Goídelc)	slemon = slippery, smooth, polished, courteous slemnaigid = smooth, polish
Middle Irish (Gaoidhealg)	slemon, slemain = smooth, polished, sleek, slippery, smooth, calm, temperate, gentle, affable, courteous slemnán = smoothness, flattery, cajoling talk sleimne, slemnae = smoothness, slipperiness, gentleness slemnaigid = to make smooth, polish, lubricate, soften, slip, slide
Irish (Gaeilge)	sleamhain [ˈʃlʲawənʲ / ˈʃl̠ʲãuwənʲ] = smooth, slippery, sleek, slippery, sly sleamhaine = smoothness, sleekness, slipperiness sleamhnaigh = to slide, to slip, to go unnoticed, to smooth sleamhnán = slide, runner, bob (of sledge), chute, shoot, slippery sleamhnánach = smooth, slippery, sly sleamhnánaí = slippery / sly person sleamhnú = to slide, slip, slither
Scottish Gaelic (Gàidhlig)	sleamhainn [ʃl̪ʲɛ̃ũ.ɪn̪ʲ] = slippery, smooth strong>sleamhaineag [ʃl̪ʲãũ.ɪn̪ʲag] = slide
Manx (Gaelg)	shliawin, sliawin, shliawn [ʃlʲãunʲ] = slippery, smooth, sly, sleek, soapy, insidious, lubricated, greasy shliawinaghey = to become slippery shliawney = slippery shliawinane = chute, slide, glide, runner, slipway, shoot shliawinid = smoothness, slipperiness, slyness, insidiousness
Proto-Brythonic	*llɨβ̃n = coal (?)
Old Welsh (Kembraec)	linīnt = to make smooth (?)
Middle Welsh (Kymraec)	llywin, llyfyn, llyfnet, llyvn = smooth, level, plain, flat, polished, slippery llyfnu, Llyfny = to harrow, to make smooth, to pat, to polish
Welsh (Cymraeg)	llyfn [ɬɨ̞vn / ɬɪvn] = smooth, level, plain, flat, polished, slippery llyfnaf, llyfnu = to harrow, to make smooth, to pat, to polish llyfndra = smoothness, levelness, evenness, sleekness, ease, fluency llyfnedig = smoothed, polished
Middle Cornish (Cernewec . Kernuak)	leven = smooth, even, level
Cornish (Kernewek)	leven = even, level, plain, smooth levena = to smooth levender = evenness levenhe = to level levenheans = terracing
Old Breton (Brethonoc)	limn = smooth (?)
Middle Breton (Brezonec)	dileffn = smooth, plain, polished
Breton (Brezhoneg)	levn [ˈlẽwn] = smooth, plain, polished levnaat = smooth, smoothing levnadur = polishing, smoothing levnañ [ˈlẽw.nːã] = to slip levnenn = polished

Etymology: from Proto-Indo-European *(s)ley- (slime, slimy, sticky, slippery). Words from the same roots possibly include slime in English, slijm (slime, mucus) in Dutch, Schleim (mucus, slime) in German, limon (silt) in French and limo (mud, slime, slit) in Spanish [source].

Splitting Up

26th December 202526th December 2025 By Simon

Words for split, cleft, slit and related things in Celtic languages.

Fissures in the cliffs

Words marked with a * are reconstructions.

Proto-Celtic	*skotlā = fissure, cleft
Old Irish (Goídelc)	scoiltid‎ = to split, to cleave
Middle Irish (Gaoidhealg)	scoiltid‎, scoltaid, sgoltadh, sgaltadh = to split, to cleave, to divide scoltad, sgoltadh, sgaltadh = act of splitting, cleaving, dividing scoiltén‎ = piece, fragment
Irish (Gaeilge)	scoilt = split, crack, cleavagte, fissure, parting, rupture, crease scoilt(eadh) = to split, break apart, crack, cleave, part, divide scoilteach = splitting, tending to burst scoilteacht = cleavage scoilteadh = fission, scission scoilteán = (small) crack, fissure, cleft object, cleft stick scoilteoir = (person) splitter, slitter, cleaver
Scottish Gaelic (Gàidhlig)	sgolt [sgɔLd] = split, slit, cleft, rent sgoilt [sgɔldʲ] = (to) split, cleave, slit, crack sgoilte [sgɔldʲə] = split, cloven, cleaved, split, cracked sgoilteadh [sgɔldʲəɣ] = (act of) splitting, split, cleaving, slitting, cracking sgoiltear = splitter
Manx (Gaelg)	skeilt = split, cleft, splintered scolt = rent skeiltey = to split, rend, splinter, splintering, splitting scoltey = to split, cleave, hew, chop up, rend, slit, burst; fault, crevasse, cleft, crack, fissure skeilteyder = splitter, render scolteyder = splitter, chopper, gutter, cleaver, hewer, nutcracker scoltit = split, chopped, cloven parted, gutted, hewn, burst, slit, cleft
Middle Welsh (Kymraec)	hollt = cleft, cleavage, fissure, rift, fault, crack, crevice, slit, split, splinter holli, hyllt = to split, cleave, slit, divide, open, break, rend, sever holldedic = split, cleft, cloven, forked
Welsh (Cymraeg)	hollt = cleft, cleavage, fissure, rift, fault, crack, crevice, slit, split, splinter holltadwy = fissile holl(t)af, holl(t)i = to split, cleave, slit, divide, open, break, rend, sever hollt(i)edig = split, cleft, cloven, forked hollt(i)ad = a splitting, cutting, dividing, slitting
Cornish (Kernewek)	fols = cleft, fissure, rift, split folsa, folja = to split folsans, foljans = splitting
Middle Breton (Brezonec)	faout, faut, faoüt = slot feutiff = to split, to crack open
Breton (Brezhoneg)	faout [ˈfɔwt] = split, slot faoutadeg = splitting faoutadur = crack faoutañ [ˈfɔwtã] = to split, to crack open faouter = splitter

Etymology: from Proto-Indo-European *(s)pelH- (to cut separate) [source].

Shady Shadows

11th December 202511th December 2025 By Simon

Words for shadow, shade and related things in Celtic languages.

Shady shadows

Words marked with a * are reconstructions.

Proto-Celtic	skāto(m) = shadow ufo-skāto/u = shadow, shelter
Old Irish (Goídelc)	scáth [skaːθ] = shade, shadow, shelter, protection foscad = shade, shelter
Middle Irish (Gaoidhealg)	scáth, scatha, sgátha [skaːθ] = shade, shadow, reflexion, image, phantom, spectre, shelter, covering, protection scáthaig(h)the = frightened, terrified scáthán, scathan, sgathán = mirror, looking-glass foscad, foscud, foiscthe, foscaidh = shadow, shade, gloom, glimmer, shelter, protection
Irish (Gaeilge)	scáth [sˠkɑː / ˈsˠkæː] = shade, shadow, covering, protection, screen, reflected image, phantom, fear, dread, bashfulness, timidity scáthach = shady, sheltered scáthaigh = to shade, darken, obscure, cover, screen, protect scáthán = mirror, looking-glass, centre of attraction scáthánach = reflecting, specular scáthlán = shelter, open-ended hut or shed, screen, (lamp) shade foscadh = (literary) shade, shadow, shadowy form, shelter
Scottish Gaelic (Gàidhlig)	sgàth [sgaː] = shade, shadow, dread, apprehension sgàthach [sgaː.əx] = shady, shadow, timid, fearful, shy, skittish sgàthachd [sgaːhəxg] = timidity sgàthag [sgaː.ag] = dread, fright sgàthair [sgaː.ɛrʲ] = coward sgàthan [sgaːhan] = looking-glass, mirror, reflector sgàthanaichte [sgaːhanɪçdʲə] = mirrored fasgadh [fasgəɣ] = (act of) sheltering, shelter
Manx (Gaelg)	scaa = shadow, shade, screen, cover, timidity, apparition, ghost scaagh = bashful, timid, shadowy, shady scaaghey = to darken, overshadow, shade, shadow, shadowing scaadooagh = shadowy, shadowing, shady scaane = mirror
Middle Welsh (Kymraec)	isscaud, isgaud, yscaỼt, ysgod, ysgaỼt = shade, shadow, darkness gwascawt, gwasgawt, gwasgawd = shelter, shady place, shadow kyscaut, kysgod, cyscod = shadow, reflection, shade kyscoty, kysgodi, kyscodi = to shelter, defend, protect yscodic, iscodic, ysgodic = retreating, fearful, skittish, sheltered ysgodigaw = to frighten, retreat, flee, escape
Welsh (Cymraeg)	ysgod = shade, shadow, darkness, night, soul, spirit, apparition, goblin, appearance, fright, disguise, mask cysgod = shadow, reflection, shade, likeness, phantom, symbol, shelter cysgodaf, cysgodi = to shelter, defend, protect cysgodol = shadowing, sheltering, shady, snug gwasgod = shelter, shady place, shadow (y)sgodig = retreating, fearful, skittish, sheltered ysgodigaf, ysgodigo = to frighten, retreat, flee, escape
Old Cornish	scod = shade, shadow
Middle Cornish (Cernewec)	schus = fear, suspicion
Cornish (Kernewek)	skeus, skeuj = shadow, reflection skeusedner, skeusenner = photographer skeusek = shady, suspicious skeusen = photograph skeusenieth, skeusenweyth = photography skeusener, skeusenores = photographer skeusi = to elude, escape, evade capture
Old Breton (Brethonoc)	scot = shadow, reflection, ghost guascotou = shelter, shade
Middle Breton (Brezonec)	squeut = shadow, reflection, ghost goasquet = shelter, shade
Breton (Brezhoneg)	skeud [skøːt] = shadow, reflection, ghost skeudan = to shade skeudenn [ˈskøːdɛn] = image, illustration skeudennadur = figurine, illustration skeudennadurezh = iconography skeudennaouañ = to illustrate gwasked = shelter, shade

Etymology: from Proto-Indo-European *sḱeh₃t- (darkness, shadow) [source]. The English words shadow and shade come from same roots, as do schaduw (shadow) in Dutch, Schatten (shadow, shade) in German, and skodde (fog, mist) in Norwegian [source].

Telling Tales

7th December 20257th December 2025 By Simon

Words for story, tale, news and related things in Celtic languages.

Telling Tales

Words marked with a * are reconstructions.

Proto-Celtic	skʷetlom = story kom-skʷetlom = (?)
Primitive Irish	*skʷetlan = story
Old Irish (Goídelc)	scél, scel, scéuill, sceuill [sʲkʲeːl] = story, tale, news scélach = gossiping, gossipy scélaige = story-teller scélaigecht = story-telling airscél = story, tale
Middle Irish (Gaoidhealg)	scél, scel, scéuill, sceuill = story, narration, tale, news, tidings, information, account, statement, reproach, accusation, argument, pleading, defence, excuse, event scélach = given to story-telling, gossiping, prattling scélaige = story-teller, historian scélaigecht = story-telling, stories scélugad = story-telling, gossiping airscél, = famous tale, (edifying) story, parable
Irish (Gaeilge)	scéal [ʃceːlˠ / ʃcialˠ] = story, historical, biographical account, narrative, tale, anecdote, account of an event, piece of news, report, theme, plot, state of affairs, matter, circumstance scéala = news, tidings, word, message, information, disclosure scéalach = news-bearing, gossiping scéalaí, scéaltóir = story-teller, bearer of news scéalaigh = to relate scéalaíocht = (act of) story-telling
Scottish Gaelic (Gàidhlig)	sgeul [sgʲial̪ˠ] = story, news, tidings, sign sgeulach [sgʲial̪ˠəx] = pertaining to or abounding in tales, fond of tales, newsmongering sgeulachadh [sgʲial̪ˠəxəɣ] = (act of) narrating, narration, nattering, rambling, yarning sgeulachd [sgʲial̪ˠəxg] = story, tale, yarn, fable, legend sgeuladair [sgʲial̪ˠədɪrʲ] = storyteller, newsmonger sgeulaadh [sgʲial̪ˠəɣ] = tale-telling, telling of tales sgeulag [sgʲial̪ˠag] = small tale/story
Manx (Gaelg)	skeeal = story, tale, yarn, tidings, rumour, report, history, legend skeealagh = narrative skeealaght = anecdotage, history, story-telling skeealeragh = gossip, storyteller, talebearer, tattler, communicative, pratling, tattling skeealerey = gossip, newsmonger, storyteller, talebearer, taleteller
Middle Welsh (Kymraec)	chuetlev, hwetil, cheutil, cheudyl, chwetyl, chwedyl = story, account, legend, fable, tidings, news, report, rumour, saying, adage chuedleuha, chwedleua = to speak, chat, converse, discourse, commune, gossip chwedleugar, chwedlevgar = talkative, garrulous, gossipy, mythical, legendary chwedlevwr, chwdelcwr = talker, gossip, story-teller, racouteur
Welsh (Cymraeg)	chwed(d)l [ˈχwɛdɛl] = story, account, legend, fable, tidings, news, report, rumour, saying, adage chwedlaidd = mythical, fabulous, mythological chwedlddysg = mythology chwedlëig = talkative, gossiping chwedluach prattle, idle gossip chwedleua(f), chweddlueo = to speak, chat, converse, discourse, commune, gossip chwed(d)leugar = talkative, garrulous, gossipy, mythical, legendary chwedleuwr = talker, gossip, story-teller, racouteur
Middle Cornish (Cernewec)	whethel = narrative, story, tale
Cornish (Kernewek)	hwedhel = narrative, story, tale hwedhela = to narrate, tell tales hwedhlans = narration hwedhlek = narrative hwedhlor(es) = narrator
Middle Breton (Brezonec)	quehezl = information (?)
Breton (Brezhoneg)	kehel = information, intention, question, piece of news, review, report kehela = toward, with regard to keheladur = veneration, worship kehelañ = to announce, inform, worship

Etymology: from Proto-Indo-European *sekʷ (story) [source]. The Brythonic words were possibly borrowed from Old Irish [source]. The English word saga comes from the same roots, via Old Norse saga (epic tale, story) [source]. Saw comes from the same roots, via Old English sagu (saw) [source].

Nettles

20th November 202520th November 2025 By Simon

Words for nettle and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	*ninatis = nettle
Old Irish (Goídelc)	nenaid = nettle
Middle Irish (Gaoidhealg)	nenaid, neanaidh = nettle nentóg, nenntog, neantog, neanntóga, nenntóc = nettle
Irish (Gaeilge)	neanta = nettle(s), stringing, irritating, painful, irritable, testy neantóg [ˈn̠ʲan̪ˠt̪ˠoːɡ] = nettle neantóg loiscneach = stinging nettle neantúil = nettle-like, stinging, irritating, irritable, testy
Scottish Gaelic (Gàidhlig)	neanntag [n̪ʲãũn̪ˠdag] = common/stinging nettle (urtica dioica) deanntag [dʲãũn̪ˠdag] = common/stinging nettle feanntag [fjãũn̪ˠdag] = common/stinging nettle eanntag [ɛ͂ũn̪ˠdag] = common/stinging nettle deanntag / feanntagach / eanntagach [dʲãũn̪ˠdagəx / fjãũn̪ˠdagəx / ɛ͂ũn̪ˠdagəx] = place where nettles grow, common/stinging nettle
Manx (Gaelg)	undaagagh = (stinging) nettle, urticaceous (nettle-like)
Proto-Brythonic	*nɨnad = nettles
Middle Welsh (Kymraec)	danhad, danat, dynat, dynhad danatl = nettles
Welsh (Cymraeg)	danadl [ˈda(ː)nadl] = nettles, plants of the genus Urtica, and other plants similar in appearance. danhad(l)en, dynhaden = nettle danadl duon = stinging-nettles danadl-dir = land that brings forth nettles or thorns danhad(l)og, dynhadog = abounding or overgrown with nettles
Old Cornish	linhaden = nettle
Middle Cornish (Cernewec)	linhaden = nettle
Cornish (Kernewek)	linas = nettles linasen = nettle linasek = bed of nettles
Middle Breton (Brezonec)	linat, linad = nettles linhadenn = nettle linhadec = nettle-infested place
Breton (Brezhoneg)	linad [ˈlĩː.nat] = nettles linadenn = nettle linadeg [lĩ.ˈnɑː.dɛk] = nettle-infested place

Etymology: uncertain [source]. Possibly from Proto-Indo-European *neh₂d- (to twist, knot, tie), which might be the root of nettle in English, netel (nettle) in Dutch, Nessel (nettle, muslin) in German, nässla (nettle) in Swedish [source].

What?

12th November 202512th November 2025 By Simon

Words for what? which? who? where? and related things in Celtic languages.

What?

Words marked with a * are reconstructions.

Proto-Celtic	*kʷid? = what?
Old Irish (Goídelc)	cid? = what? cote, cate, catte [ˈko.d̠ʲe] = of what sort is …? what is …?
Middle Irish (Gaoidhealg)	cote, coteeet, codde, cate, cati, cáte = what (is)?
Irish (Gaeilge)	cad? [kad̪ˠ] = what? where? (in Munster) cad é? [kəd̪ˠˈeː] = what? (in Connacht & Ulster) cad é mar (atá tú)? = how (are you)? (in Ulster) céard? [ceːɾˠd̪ˠ] = what? (in Connacht) goidé? [ɡəˈtʲeː] = what? (in Connacht & Ulster) cad chuige? [kɑt̪ˠ ˈxɪɟɪ / kəˈt̪ˠiɟə] = why? (in Mayo,& Ulster) cad ina thaobh? [ˌkɑn̪ˠəˈheːvˠ] = why? (in Munster)
Scottish Gaelic (Gàidhlig)	ciod? [kʲid] = what? ciod air bith = whichever, whatever ciod e? = what? ciod thuige? [kʲid hugʲə] = why? dè? [dʲeː] = what? who? dè man? dè mar? [deː man / dʲeː mar] = how?
Manx (Gaelg)	cre? = what? cre fa? = why? cre wooad? = how much? quoid? = how many? how much?
Old Welsh (Kembraec)	pa? = what? which?
Middle Welsh (Kymraec)	pa? py? = what? which? paham? pam? = why? reason, cause, question
Welsh (Cymraeg)	pa? [paː] = what? which? paham? pam? = why? reason, cause, question pa bryd? = when? at what time? pa un? p’un? = who(m)? which (one)?
Middle Cornish (Cernewec)	pe? pa? py? = what? which? where? pa le? = where place? where? pahan = what perag? prâg? = for what? wherefore? why? pattel? patla? fattel? fatla? = how? by what means? pe? pa? py? =
Cornish (Kernewek)	py? pe? = what? which? py lies? = how many? pyth? = what?, that which ple? = where? prag? = why? what for? fatla? = how?
Old Breton	pe? = what?
Middle Breton (Brezonec)	pe? pé? = what? peguement? pe quement? = how much? how many? pe en lech? = where? penaus? penos? = how? perac? pe-rac? = why? petra? = who? what?
Breton (Brezhoneg)	pe? [peː] = which one? pegeit? [peˈɡɛjt] = how long? how far? pegement? [pe.ˈɡẽ.mːɛnt] = how much? how many? pegoulz? [pe.ˈɡuls] = when? pehini? [peˈ(h)ĩːni] = which one? pelec’h? [peˈlɛːx] = where? penaos? [pẽ.ˈnɔːs] = how? perak? [pe.ˈrɑːk] = why? peseurt? [peˈsøʁt] = what? what kind? petra? [ˈpe.tʁa] = who? what?

Etymology: from Proto-Indo-European *kʷid (what? which?) [source]. Words from the same PIE roots include çë (what?) in Albanian, kas (that, which, who) in Latvian, что (što – that, what, which) in Russian, che (what, which) in Italian, ¿qué? (what? which?) in Spainish [source].

Proto-Celtic	*kʷei? = who?
Old Irish (Goídelc)	cía = what? where? who? how? if, although cía airet? = how long? cía airm? cairm? airm? = where? cía chruth? = how? cía méit? = how many? how much?
Middle Irish (Gaoidhealg)	cía? ce? ci? = who? what? how? where?
Irish (Gaeilge)	cá? = what? how? where? cá hait? = (at) what place? where? cá huair? = at what hour? when? cá fhad? = how long? cá mhéad? = how much? how much? cé? = who? cén? = what? which?
Scottish Gaelic (Gàidhlig)	cò? [koː] = who(m)? where? cò idir = whoever cò ann? = wherein? cò as? [ko as] = where from?
Manx (Gaelg)	quoi? [kwəi] = who? whom? which? whichever, who? quoi erbee = who(so)ever, whom(so)ever quoi jeu? = which one? quoid? c’wooad? = how many? how much?
Proto-Brythonic	*puɨ? = who?
Middle Welsh (Kymraec)	pwy? = who(m)? what? pwy bynnac, pwybynnag = whoever
Welsh (Cymraeg)	pwy? [puːɨ̯ / pʊi̯] = who(m)? what? pwy bynnag = whoever
Middle Cornish (Cernewec)	pew? pyw? p(y)u? piwa? = who? pywpenag, piwha bennac, piwa bennac, pyu penagh = who(s)ever
Cornish (Kernewek)	piw? [piˑʊ] = who? piw penag, piw pynag = whoever piw? = who?
Old Breton (Brethonoc)	piu? = who?
Middle Breton (Brezonec)	piu? piou? = who? piupennac, piu pennac, piou bennac = whoever
Breton (Brezhoneg)	piv? [piw] = who? piv bennak = whoever pivelezh = identity

Etymology: from Proto-Indo-European *kʷís (who? what? which, that) [source]. Words from the same PIE roots include ca (than, as) in Romanian, hve (how, like, as) in Icelandic, how and when in English, and hoe (how) in Dutch [source].

Tenacious Toughness

5th November 2025 By Simon

Words for tough, tenacious, stiff and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	*reginis = hard, stiff, tough
Old Irish (Goídelc)	rigin = hard, tough, slow
Middle Irish (Gaoidhealg)	rigin = tough, hard, unyielding, slow, dilatory, prolix, slow-moving, tranquil rigne = tenacity, toughness, slowness, prolixity, sluggishness
Irish (Gaeilge)	righin [ɾˠiːnʲ] = tough, tenacious, unyielding, stubborn, slow, deliberate, lingering, tardy, vicous, stringy, ropy righne = toughness righneáil = (act of) lingering, loitering, dawdling righneálach = lingering, loitering, dawdling righneálaí = lingerer, loiterer, dawdler, stubborn person righneas = toughness, tenacity, stubborness, slowness, tardiness, viscosity righnigh = to toughen, persevere, linger, delay, become viscid
Scottish Gaelic (Gàidhlig)	righinn [r̪ʲi.ɪn̪ʲ] = stiff, tough, sticky, adhesive righinn-bheulach = tight-lipped rìghneas [r̪ʲiːnəs] = stiffness, tenacity
Manx (Gaelg)	reen = hard, rigid, stiff, unyielding, thick-skinned reenagh = stringy, toughish, tight reenaghey = stiffen, toughen(ing) reeneyder = stiffener, toughener, tonic reenid = rigidity, starkness, toughness
Proto-Brythonic	*rrėɣɨn = (?)
Old Welsh (Kembraec)	Regin = tribal name
Middle Welsh (Kymraec)	rein, rain, rhain = stiff (of corpse), stone-dead, rigid, stiffened
Welsh (Cymraeg)	rhain [r̥ai̯n] = stiff (of corpse), stone-dead, rigid, stiffened

Etymology: from Proto-Celtic *regeti (to stretch, to straighten), from Proto-Indo-European *h₃réǵeti (to be straightening, from *h₃réǵ- (to straighten, to righten) [source].

Words from the same roots include rail, rank, realm, regime, regular and rule in English, Regel (rule) in German, rang (row, line, position) in French, rheng (rank, row) in Welsh, reja (grate, grating, grille) in Spanish, rank [source].

Middle Welsh (Kymraec)	serth = steep, sloping, precipitous, high syrthaỽ, syrthav = to fall, tumble, prostrate oneself
Welsh (Cymraeg)	serth = steep, sloping, precipitous, high, straight, vertical, upright, discourteous, uncivil, insulting, curt, surly, unseemly, uncouth serthaf, serthu = to become steep, to revile, abuse, malign serthaidd = steep, precipitous, discourteous serthrwydd = steepness, obscenity, ribaldry syrth(i)af, syrth(i)o [ˈsərθjɔ] = to fall, tumble, prostrate oneself
Middle Cornish (Cernewec)	serth = stiff, hard
Cornish (Kernewek)	serth = abrupt, erect, stiff, upright, vertical serthals = precipice serthi = to rise up sharply serthter = abruptness, inflexibility, rigidity, rigour, steepness, stiffness, verticality
Middle Breton (Brezonec)	serz = abrupt, tightly, firmly
Breton (Brezhoneg)	serzh [ˈsɛrs] = steep, robust, stable serzhañ = to tackle, to go back up serzhded = escarpment, cliff serzhder = perpendicularity serzhdenn = ascent, solid, robust

Etymology: unknown, possibly related to start in English, styrte (to rush, fall down, overthrow, jump) in Dutch, and stürzen (to fall down, drop, tumble) in German [source].

Proto-Celtic	razgo / ringo- = torture (?)
Old Irish (Goídelc)	riag = torture
Middle Irish (Gaoidhealg)	ríag = torture
Irish (Gaeilge)	riagh = rack, torture, execute (literary)
Scottish Gaelic (Gàidhlig)	rag [r̪ˠag] = inflexible, rigid, stiff, pig-headed, stubborn, stark, tense ragach [r̪ˠagəx] = stiff, tough ragadh [r̪ˠagəɣ] = (act of) stiffening, making rigid, benumbing ragaireachd [r̪ˠagɪrʲəxg] = extortion
Manx (Gaelg)	rag = stiff
Breton (Brezhoneg)	reut [røːt] = stiff, rigid, sharp, stocky reutaat = to stiffen reutadur = stiffening, rigidification reutaer = stiffener reuted = rigidity

Etymology (Breton): from Old French roide (stiff, straight, steep, abrupt), from Latin rigidus (stiff, rigid, hard, stern), from rigeō (to be stiff, stiffen) from Proto-Italic *rigēō, from Proto-Indo-European *Hreyǵ- (to stretch out, reach, bind) [source]. The Goidelic words come from the same PIE roots, via Proto-Celtic *rigo- (to stretch) [source].

Words from the same roots include raide (stiff, straight, steep, abrupt) in French, rigid in English, recio (tough, robust, strong) in Spanish and rijo (hard, tough, stiff, wiry) in Portuguese [source].

Sighing Groans

29th October 202529th October 2025 By Simon

Words for sigh, groan and related things in Celtic languages.

Bridge of Sighs, Cambridge, UK

Words marked with a * are reconstructions.

Proto-Celtic	*ouxsanatā = sign, groan
Old Irish (Goídelc)	osnad = sign, groan
Middle Irish (Gaoidhealg)	osnad, osna, osnam, asnad = sign, groan or similar utterance (of pain, fatigue, etc), a grievance, cause of complaint, impeachment
Irish (Gaeilge)	osna [ˈɔsˠn̪ˠə] = sigh, groan smiorúil = marrowy, medullary, lively, spirited, manly osnaigh = to sigh osnaíl = sighing, sobbing osnaíoch = sighing
Scottish Gaelic (Gàidhlig)	osna [ɔsn̪ˠə] = sigh osnach [ɔsn̪ˠəx] = sighing osnachadh [ɔsn̪ˠəxəɣ] = (act of) sighing osnaich [ɔsn̪ˠɪç] = groaning, sighing
Manx (Gaelg)	osney = groan, sigh, sough, pant, blast osnaghey = to moan, sigh, sough, gasp, groan; sighing
Proto-Brythonic	*ʉxanad = sigh (?)
Middle Welsh (Kymraec)	ucheneid, ucheneit, vcheneit, ychenaid = sigh, groan, moan ucheneidaỽ, ucheneidio, vcheneiddio = to sigh, groan, moan, gasp, sob
Welsh (Cymraeg)	uchenaid = sigh, groan, moan, aspiration ucheneid(i)o = to sigh, groan, moan, gasp, sob ucheneidiol = sighing, short-winded, panting, aspirate, fricative ucheneidiwr = one who sighs or groans achenaid = sigh, aspiration ochenaid = sigh, groan, moan, sorrow, short prayer ochneidio = to sigh, moan, groan ochneidiol = sighing
Middle Cornish (Cernewec)	hanadzhan = sigh hynadzha = to groan, to sigh hynadzhas = a groan, sigh, howling
Cornish (Kernewek)	hanas = groan, murmur, sigh, whisper hanasa, hanaja = to groan, murmur, sigh, whisper
Middle Breton (Brezonec)	huanat, vhanat = sigh huanadaff = to sigh
Breton (Brezhoneg)	huan = sigh huanad [hy.ˈãː.nat] = sigh, sorrow, pain, affliction huanadañ = to sigh huanader = sighing, one who sighs

Etymology: from Proto-Celtic *(o)uxs- (up) and *anati (to pause, remain – originally to breathe), from Proto-Indo-European *upó-/*h₁ewp- (up, to rise), and *h₂énh₁ti (to breathe) from *h₂enh₁- (to breathe) [source].

Words from the same roots include angi (breath, ethos) in Icelandic, ånde (breath, to breathe) in Danish, anhéler (to pant, gasp) in French, ëndë (desire, inclination, pleasure) in Albanian, جان (jân – soul, life, energy, strength, essense) in Persian, anemone, animal, animate, animosity, exhale and inhale in English [source], and words for up, above, high, elevated, noble, chief, leader, life, soul, spirit, breath, etc in Celtic languages.

Middle Welsh (Kymraec)	ebwch = groan, sob, sigh, gasp
Welsh (Cymraeg)	ebwch = groan, sob, sigh, gasp, (short) breath, blast, spasm ebychiad = a gasping, a sighing, gasp, sigh, interjection, exclamation ebychnod = exclamation mark ebychol = sighing, groaning, gasping ebychu = to gasp, sigh, groan, exclaim, interject

Etymology: unknown [source].

Celtiadur

Exploring connections between Celtic languages

Category: Etymology

Thousands

Separation

Smoothly Slippery

Splitting Up

Shady Shadows

Telling Tales

Nettles

What?

Tenacious Toughness

Sighing Groans