Sorrow & sadness

Words for sorrow, sadness and related things in Celtic languages.

sad pug

Proto-Celtic *trougos/*trowgo- = sorry, sad, wretched
Old Irish (Goídelc) trúag, tróg = miserable, wretched, emaciated, wretch
trúagdae = miserable, wretched
trógán, trúagán = miserable person, wretch, pauper
trúaige = affliction, compassion, misery, pity, wretchedness
Middle Irish (Gaedhealg) trúag = wretched, pititable, miserable, sad; thin, lean, emaciated; wretch, miserable person
trúagdae, trogdae, trúagdai, troghda = miserable, wretched. piteous
trúagán = miserable person, wretch, pauper
trúagnait, trógnait = wretch, miserable person
trúaige = misery, wretchedness, affliction
trúaigméil = pitiable, sorrowful
Irish (Gaeilge) trua [t̪ˠɾˠuə] = pity, sympathy, compassion, miserable person, wretch; pitiable, miserable, wretched; lean, thin, emaciated
truacánta = piteous, plaintive
truacántacht = piteousness, plaintiveness
truachroíoch = kind-hearted, compassionate, heartrending, piteous
truacht = leanness
atruach = compassionate
truán = miserable person, wretch; thin, emaciated creature, importunate person
truanairt = wretch
truánta = wretched; thin, emaciated
truántacht = wretchedness; thinness, emaciation
Scottish Gaelic (Gàidhlig) truagh [truəɣ] = abject, forlorn, miserable, pitiful, poor, sorry
truaghan [truəɣan] = poor soul/thing, wretch
truaghag [truəɣag] = poor/pitiful thing, poor wee thing (female)
truaghaileachd [truəɣaləxg] = compassionateness, tender-heartedness
truaghanachd [truəɣən̪ˠəxg] = abjectness, miserableness, wretchedness
truas [truəs] = pity, compassion, sympathy
Manx (Gaelg) truan = misery
truanagh = miserable, mournful, sorrowful person
truanys = misery
treih = abject, deplorable, feeble, forlorn, fragile, miserable, pathetic, piteous, pitiful, regrettable, rueful
treihaght = misery, pitifullness, pitifulness
treihnagh = mournful
treihys = abjection, abjectness, fragility, misery
Gaulish *trugan = wretch
Middle Welsh (Kymraec) tru, trv = wretched, miserable, deplorable, pitiful, pathetic
truan = wretch, miserable person
truanu = to take pity, feel compassion
truaneid, truanaidd = wretched, miserable, deplorable
tryanedd, tayyrnedd = wretchedness
trueni = misery, wretchedness, abjectness, degradation
truanus = wretched, miserable, deplorable, poor
trỽch, troch, truch = unfortunate, sad, wretched
Welsh (Cymraeg) tru [trɨː/triː] = wretched, miserable, deplorable, pitiful, pathetic
truan = wretch, miserable person; wretched, miserable, deplorable, pitiful, pathetic, poor, weak
truanaf, truanu = to take pity, feel compassion
truanaidd = wretched, miserable, deplorable, pitiful
truanedd = wretchedness
trueni = misery, wretchedness, abjectness, degradation
truenus = wretched, miserable, deplorable, poor
trwch = unfortunate, sad, wretched, poor; bad, evil, wicked; unfortunate person, wretch, scoundrel
Old Cornish troc = miser
Middle Cornish (Cernewec) tru = alas, pity, sad, woe
trueth = pity, compassion
troc = wretched, miser
Cornish (Kernewek) tru = alas
truan = sadly, miserable, unfortunate, wretched
truedh = pity, sympathy
truedhek = sadly, pathetic, pitiful, plaintive, sad
trogh = broken, wretched
Middle Breton (Brezonec) tru = pitiful, wretched, miserable
truant = pitiful, wretched, miserable
trugarez = pity, mercy, forgiveness, thanks, misery
Breton (Brezhoneg) tru = pitiful, wretched, miserable, wretch
trugarez = thank you, mercy, forgiveness
truant = beggar
truanter = cheater, supplicant

Etymology: possibly from the Proto-Indo-European *terh₁- (to rub, turn, drill, pierce). Words from the same roots possibly include truant in English, and truand (crook, gangster, beggar) in French [source].

Proto-Celtic *brugnos = saddness, pain
Old Irish (Goídelc) brón [broːn] = sorrow, grief, lamentation, distress, burden
Irish (Gaeilge) brón [bˠɾˠoːnˠ] = sorrow, grief, grieving, lamentation; distress, burden
brónach [ˈbˠɾˠoːnˠəx] = sad, sorrowful
Scottish Gaelic (Gàidhlig) bròn [brɔːn] = grief, sadness, sorrow, mourning, affliction
brònach [ˈbrɔːnəx] = doleful, miserable, rueful, sad, sorrowful; disconsolate
Manx (Gaelg) bran = sorrow, blackness of soul
branagh = mournful, black (as outlook)
Welsh (Cymraeg) brwyn [bruːɨ̯n / brʊi̯n] = sorrow, grief, sadness; sorrowful, grievous, sad, heavy; pensive

Etymology: possibly from Proto-Indo-European *gʷruHǵʰ-nó-, from *gʷrewHǵʰ- (to bite) + *-nós, or from *bʰreg- (to break) [source].

Welsh (Cymraeg) trist [triːst / trɪst] = sad, unhappy, sorrowful, mournful, pensive, downhearted, miserable, anxious
Cornish (Kernewek) trist = sad, mournful
Breton (Brezhoneg) trist = sad

Etymology: from Latin trīstis (sad, unhappy, melancholy, morose), from Proto-Indo-European *tréystis (stubborn, in a bad mood) [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, Gerlyvyr Cernewec, Dictionaire Favereau, TermOfis, Le dictionnaire diachronique du breton, Geriafurch, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Quick, Fast & Lively

Words for quick, fast, crazy, lively, ready and related things in Celtic languages.

Faster!

Words marked with a * are reconstructions.

Middle Irish (Gaoidhealg) tap = sudden
tapad = suddenness, haste, quickness, bravery
tapaid = quick, swift, active
Irish (Gaeilge) tapa [ˈt̪ˠapˠə] = quick(ness), ready, active, speed, vigour
tapaigean = sudden start, spring, jump, mishap
tapaigh = to quicken, grasp quickly
tapaíoch = quick, active, alert person
tapaíocht = quickness, activeness, alertness
tapóg = tendency to jump, nerviness, sudden impulse
tapógach = jumpy, nervy, impulsive
Scottish Gaelic (Gàidhlig) tapadh [tahbəɣ] = cleverness, smartness, thanks, alertness, feat, achievement
tapadh leat/leibh = thank you
tapaidh [tahbɪ] = clever, smart, brave, heroic, active, vigorous
all-tapadh = mishap, accident, misfortune
Manx (Gaelg) tappee = fast, hasty, quick, rapid, speedy, swift
tappeeid= quickness, rapidity, speed
tappeeys = quickness, rapidity, speed, nimbleness

Etymology: uncertain

Old Irish (Goídelc) opunn = fast, prompt, quick
Middle Irish (Gaoidhealg) opunn, obunn, opund, topund = quick, swift, prompt, hasty, precipitate
Irish (Gaeilge) tobann [ˈt̪ˠɔbˠən̪ˠ] =sudden, unexpected, hasty, impulsive, quick-tempered
Scottish Gaelic (Gàidhlig) obann [obən̪ˠ] = sudden, unexpected
gu h-obann = suddenly

Etymology: uncertain

Old Irish (Goídelc) ellam, ollam, ullam = quick, ready, soon, speedy
Middle Irish (Gaoidhealg) ellam, ollam, ullam = quick, prompt, speedy, soon, readily, ready, prepared, finished, complete
ellma = speed, rapidity, promptness, speedily, soon, prompty, soon enough, ready, prepared
ellmaigid = to prepare, make ready
Irish (Gaeilge) ullamh [ˈɔl̪ˠəvˠ/ˈʊl̪ˠuː] = ready, willing, prompt, prepared, predisposed inclined, finished
ullmhacht = readiness, preparedness
ullmhaigh = to make ready, prepare
ullmhaitheach = preparative
ullmhaitheoir = preparer
ullmhú = preparation
ullmhúchán = preparative, preparation
Scottish Gaelic (Gàidhlig) ullamh [ul̪ˠəv] = done, finished, ready, prepared, mature, handy, prone to
ullamhachadh [ul̪ˠəvəxəɣ] = preparing, getting ready, preparation, arranging, arrangement, providing, provision
ullamhachd [ul̪ˠəvəxg] = readiness, preparedness, proneness, aptitude, aptness
Manx (Gaelg) ullee = conversant, operational, prepared, ready

Etymology: from Old Irish ar (for, on), fo- (under, sub-) and lám (arm, hand) [source].

Old Irish (Goídelc) mer = crazy
meraige = crazy person, fool
Middle Irish (Gaoidhealg) mer = demented, crazy, wild, rash
meraige = a muddle-headed or scatter-brained person; aberration, derangement
Irish (Gaeilge) mear [mʲaɾˠ] = quick, fast, nimble, lively, spirited; precipitate, hasty, rash; quick-tempered, fiery; mad, crazy; furious, raging, angry
mearadh = madness, insanity, craze, craving
mearaí = crazed person, distracted, bewildered, person, craziness, distraction, bewilderment
mearaigh = to derange, distract, bewilder, confuse, to become distracted
mearaitheoir = distracter, bewilderer, infuriating person.
Scottish Gaelic (Gàidhlig) mear [mɛr] = merry, joyful, frisky, lively
mearachas [mɛrəxəs] = mirth, merriment
mearachd [mɛrəxg] = merriness
mearaiche = droll / merry person
Manx (Gaelg) merre [mɛr] = frenzy
Welsh (Cymraeg) miri = merry, gay, fun, merriment, mirth, tumult, fuss, bother, predicament
miriman = fool, clown, wild and unruly person
miriol = merry, gay

Etymology: possibly from English merry, or Middle English mery (happy, joyful, pleased), from Old English myrġe (pleasant, attractive, enjoyable), from Proto-West Germanic *murgī (short, slow, leisurely), from Proto-Germanic *murgijaz/*murguz (short, brief slow, leisurely), from Proto-Indo-European *mréǵʰus (short, brief) [source].

Proto-Celtic *lim-ā- = to sharpen, polish
Old Irish (Goídelc) límaid = to polish, sharpen
Middle Irish (Gaoidhealg) límaid, límad = sharpens, grinds, polishes
límtha = sharpened, burnished, keen, polished, fluent
límugud = act of sharpening
Irish (Gaeilge) líomh [mʲaɾˠ] = to grind, sharpen, file, smooth, polish, erode, destroy
líomhadh = to grind, polish, erosion, destruction
líomhadóir = grinder, filer, polisher
líomhán = file
Scottish Gaelic (Gàidhlig) lìomh [l̪ʲiəv] = polish, gloss, burnish, refinement
Manx (Gaelg) shleeu = to grind, sharpen, whet, grinding, sharpening
shleeuan = file
shleeuee = grinder
Middle Welsh (Kymraec) llim, llym, lem = sharp, pointed, keen, harsh, shill, quick, swift
lllymu = to whet, file, sharpen
llymaidd = sharp, keen, piercing, harsh, severe, eager, ardent
llymder = sharpness, keenness, harshness, severity
cyflym, kyflym = quick, swift, speedy, brisk, quick-witted, intelligent, ready, clever, sharp, keen, acute
kymlymder, cyflymdra = swiftness, quickness, rapidity
Welsh (Cymraeg) llym [ɬɨ̞m/ɬɪm] = sharp, pointed, keen, harsh, shill, quick, swift
llymaf, llymu = to whet, file, sharpen, speak severly
llymaidd = sharp, keen, piercing, harsh, severe, eager, ardent
llymder = sharpness, keenness, harshness, severity
cyflym = quick, swift, speedy, brisk, quick-witted, intelligent, ready, clever, sharp, keen, acut
cyflymaf, cyflymu = to quicken, accelerate, hasten, expedite
cyflymder = swiftness, quickness, rapidity
Middle Cornish (Cernewec) lemma, leamn, lemen, lemmen, lemyn, lemmyn, lymmyn = to sharpen, whet
Cornish (Kernewek) lymm, lebm = sharp, acute, keen, piercing, insightful
llymma = to sharpen
Middle Breton (Brezonec) lem, lemm = sharp, pointed, acute
lemaff, lemmaff = to sharpen, make sharp
lemder = acuity
lemer = sharpener
Breton (Brezhoneg) lemm = pointed, sharp, acute
lemmañ, lemmiñ = to sharpen, make sharp
lemmded = acuity
lemmell = sharp
lemmerez = sharpener
lemmet = sharp(ened), keen, pointed

Etymology: probably from PIE *sley- (smooth, slick, sticky), or from Latin līma (file), from the same PIE root [source]. Words from the same roots include slime in English, and llif (saw) in Welsh [source].

Proto-Celtic *bīwonos = ?
Middle Welsh (Kymraec) buan= fast, swift, rapid
buander = quickness, alacrity, swiftness, speed
buaned, buanez = quickness, swiftness, speed
Welsh (Cymraeg) buan [ˈbɨː.an/ˈbiː.an] = fast, swift, rapid
yn fuan = soon
mor fuan â phosibl = as soon as possible
buanaf, buanu = to accelerate, hasten, move swiftly
buander = quickness, alacrity, swiftness, speed
buanedd = quickness, swiftness, speed
Cornish (Kernewek) buan = lively, quick
Old Breton buenion = quck, fast
Middle Breton (Brezonec) buan = quck, fast
Breton (Brezhoneg) buan = quick, fast
buanaat = to accelerate
buanaer = accelerater
buanded = speed, rapidity

Etymology: probably from Proto-Celtic *biwos ((alive, living, mortal) from PIE *gʷeyh₃- (to live) [source]. Words for life and food come from the same roots, as do English words such as bioology, quick, vital, vivid and zoo [source].

Proto-Brythonic *parọd = ready, prepared
Middle Welsh (Kymraec) paraut, paravt, parawt = ready, prepared, arranged, quick, prompt, immediate, sudden, nimble, easy, available, convenient
paroded = readiness, prepardness, willingness
parotruyd, parodrwyd = readiness, willingness
embaratoi, ymbarot(t)oi = to prepare (oneself), provide oneself with necessities
Welsh (Cymraeg) parod [ˈpa(ː)rɔd] = ready, prepared, arranged, ready-made, instant (coffee, etc), quick, prompt, immediate, sudden, nimble, easy, available, convenient, absolute, downright
parodaf, parodi = to make ready, prepare
parodrwdd = readiness, willingness
paratoi [paraˈtɔi̯] = to prepare
ymbaratoi = to prepare (oneself), provide oneself with necessities
Middle Cornish (Cernewec) parys = ready
Old Cornish parot = prepared, ready
Middle Cornish (Cernewec) parys = prepared, ready
parusy = to make ready, prepare
Cornish (Kernewek) parys = conventient, handy, ready
pareusi, paruji = to cook, edit, make ready, prepare
ombareusi, ombaruji = to get ready, prepare oneself
Middle Breton (Brezonec) paret = cooked, boiled
paredet = cooked, boiled
pareiff = to boil, cook
Breton (Brezhoneg) pared [ˈpɑː.rɛt] = cooked, boiled
paredigezh = heat wave
paredin, parediñ = to cook
paredus = heating

Etymology: from Latin parātus ((alive, living, mortal) from PIE parō (I prepare), from PIE *perh₃-o (providing), from *perh₃- (to grant) [source].

Words from the same PIE roots include pare (to remove the outer covering or skin of something with a cutting device) in English, paràre (to adorn, protect, shield) in Italian, parar (to stop, put up, lift, raise) in Spanish [source] and words for grace and favour in Celtic languages.

Proto-Celtic *skīto- = tired
*exs-skīto- = tireless
Old Irish (Goídelc) scíth = irksome, tired, wearisome, weary
éscaid = eager, quick, willing
Middle Irish (Gaoidhealg) scíth = weary, tired, sad, dejected
éscaid, esceth, esced, esgaid = prompt, willing, alert, quick, eager, speedy, swift
éscaidecht, éscaidhecht, éasgaidheacht = promptness, readiness, speed
ainéscaid = slow, unhurried
airéscaid = very active, nimble
Irish (Gaeilge) scíth = tiredness, fatigue, rest
scítheach = tired, weary
scíthigh = to become tired, exhausted
éasca = swift, nimble, free, fluent, easy, ready
éascaiagh = to make easy, hurry, expedite
éascaíocht = speed, expedition, nimbleness, quickness, fluency, ease, readiness, promptness
Scottish Gaelic (Gàidhlig) sgìth [sgʲiː] = tired, weary, fatigued
sgìtheachadh [sgʲiː.əxəɣ] = fatiguing, wearing, (act of) trying someone’s paticence
sgìth [sgʲiː] =
èasgaidh [iəsgɪ] = active, energetic, nimble, readiness to oblige
èasgaidheachd = facility, nimbleness, readiness to oblige
Manx (Gaelg) skee = fatigued, tired, weary
skeeagh = tired, tiresome, wearisome, wearying
easkey = rapids
Middle Welsh (Kymraec) escud, esgud, escut, esgut = quick, swift, fleet,ready, lively, nimble, active, dexterous, diligent
escudruyd, escydrwydd = quickness, swiftness, fleetness, liveliness, agility, diligence
Welsh (Cymraeg) esgud = quick, swift, fleet,ready, lively, nimble, active, dexterous, diligent
esgudrwydd = quickness, swiftness, fleetness, liveliness, agility, diligence
esgutâf, esgutáu = to quicken
Cornish (Kernewek) skwith = sleepy, tired, weary
skwitha, skitha = to exhaust, tire, weary
skwithans = fatigue, lassitude, tediousness, tiredness, weariness
skwithhe = to tire, exhaust, weary
uskis = express, fast, quick, rapid, speedy, swift
uskisell = accelerator
uskishe = to accelerate
uskitter = velocity
Middle Breton (Brezonec) scuyz, scuih = tired, weary, fatigue
scuyzaff = to make tied
Breton (Brezhoneg) skuizh = tied, weary, fatigue
skuizhadur = lassitude
skuizhañ = to make tied
eskuit = agile, alert, diligent, prompt
eskuited = agility, diligence, promptness

Etymology: uncertain

For other words for quick see the Celtiadur posts: Early and Soon

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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




Small

Words for small, little and related words in Celtic languages.

Kittens

Words marked with a * are reconstructions.

Proto-Celtic *bikkos, *biggos, *bekkos, *beggos = small, little
Old Irish (Goídelc) bec(c) [ˈbʲeɡ] = small, little
becán = little
MIidle Irish (Gaoidhealg) bec, beg = small, little, a small amount
becaid = to make small, deplete
becaigid, begaigh = to lessen, diminish, reduce
becán, begán, beccan = a little, small quantity, a few, a small number, little one, child, humble, lowly one
becda = lowly, humble
Irish (Gaeilge) beag [bʲɔɡ / bʲɞɡ / bʲɛɡ] = little, small, small amount; few
beagadán = diminutive person, little one
beagaigh = to lesson, diminish
beagán = little, a few, a little, somewhat
beagchainteach = silent, taciturn
beagchéillí = senseless, foolish
Scottish Gaelic (Gàidhlig) beag [beg] = small, little, wee; minor; petty, puny, trifling; slight
beagadh [begəg] = to diminish, lessen, reduce
beagachadh [begəxəɣ] = diminishing, lessening, reducing
beagag [begag] = small thing, trifle
beagan [began] = a little, a few
beaganas [beganəs] = slight, snub
beagnachd [begnəxg] = parvity, smallness
Manx (Gaelg) beg = small, short, slight, few, poky, model, narrow, quiet, dwarf
beggan = somewhat, slightly, partly, faintly, a few, little, small piece
begganid = littleness, smallness, slightness
beggid = diminutive, diminutiveness, littleness, paltriness
Proto-Brythonic *bɨx = small
Middle Welsh (Kymraec) hach, bych, bâch, = small, little
baches, baçes = darling, little, little woman
bachken, bachcen = boy, lad, youngster, servant, son, child
bachcennes = young girl, maiden, damsel, lass, wench
Welsh (Cymraeg) bach [baːχ] = small, little, short; not fully grown or developed, young; insignificant, unimportant, humble; small (business); lower-case (letter); dear, beloved; poor
baches = darling, little, little woman
bachgen = boy, lad, youngster, servant, son, child
bachgennes = young girl, maiden, damsel, lass, wench
bachigol = diminutive, small, little
bychan [ˈbəχan] = little, small, minute, diminutive; inconspicuous, obscure, unimportant, petty; young inexperienced; little one, young child
bychanaf, bychanu = to abase, disparage, disregard, slight, minimize
bychander, bychandod = littleness, smallness, scarcity, contempt, pettiness
bychanig = very little/small, minute, diminutive, bit, piece
bychan bach very little
Middle Cornish (Cernewec) bechan, bian, bichan, bihan, bochan, byan, byhan = little, small
Cornish (Kernewek) byghan [‘bɪhan] = little, small
byghanhe = to reduce, make smaller
byghanna = smaller
Middle Breton (Brezonec) bihan, byhan = small
bihanaat, bihanhat, bihanat = to shrink, diminish
bihanaet, bihannaet = decrease
bihanded, bihandet, bihandætt = smallness
Breton (Brezhoneg) bihan = small, insufficient, modest, little
bihanaat = diminutive, pet name
bihanadur = miniature
bihanniver = minority

Etmology: possibly from the Proto-Indo-European *bʰég-ko-s, from *bʰeg- (to break) +‎ the suffix *-kos [source]. Words for small and little in Romance languages, such as petit in French, pequeno in Portuguese and pequeño in Spanish, possibly come from the same Proto-Celtic root, via the Latin word *pittus (small, little) [source].

Proto-Celtic *legus = small
Gaulish lau = small
Old Irish (Goídelc) lagu, lugu, laigiu = smaller
Middle Irish (Gaoidhealg) lagu = smaller
Irish (Gaeilge) laghad = smallness, fewness
laghadaigh = to lessen, decrease, diminish, reduce
laghadaitheach = lessening, decreasing
laghadú = decrease, diminuition, reduction
laghadúchán = (act of) diminution
níos lú = smaller
is lú = smallest, least
Scottish Gaelic (Gàidhlig) lugha = less, least, more or most disagreeable
nas lugha = smaller, less, shorter, minimum
as lugha = smallest, tiniest, shortest
laghad [̪l̪ˠɤɣəd] = smallness, littleness, minority
luighead = degree of smallness, littleness
laghdaich, lùghdaich = (to) decrease, diminsh, lessen, reduce, decline
Manx (Gaelg) loo = fewer, least, little(r), minimim
(ny) sloo = less, lesser, smaller, shorter
by loo = smallest, fewest, less
leodagh = decreasing, degrading, dreogatory
leodaghey = to decrease, minimize, reduce, diminish
Proto-Brythonic *llaɣw = small, bad
*llaɣü = smaller
Middle Welsh (Kymraec) llaw = small, little, low, mean, weak
llei, lley = smaller, less, fewer
leyhaf, lleyaf, lleiaf = least, smallest, lowest, fewest
leihaa, leihaei, lleihav, leihau = to become smaller or less
Welsh (Cymraeg) llaw = small, little, low, mean, weak
llai [ɬai̯] = smaller, less, fewer
lleia(f) = least, smallest, lowest, fewest
lleiafrif = minority
lleihad = a lessening, decrease, easing
lleihadog = belittling, diminutive, derogative
lleihau = to become smaller or less, to diminish, to shink, to decrease, to less, to shorten
Middle Cornish (Cernewec) le = less, smaller
leia = least, smallest
leyhy, lyha = to make smaller, diminish, lessen
Cornish (Kernewek) le = smaller, less, lesser, fewer, minor
lehe = to lessen, extenuate, mitigate, reduce, shrink, zoom out
leheans = reduction
Old Breton (Brethonoc) lau = less, fewer
Middle Breton (Brezonec) lau = less, fewer
Breton (Brezhoneg) lei = less, fewer
leiaat = to decrease, lower, attenuate

Etymology: from *h₁léngʰus (lightweight, easy, nimble), from *h₁lengʷʰ- (to move lightly or effortlessly; lightweight) [source]. Words from the same PIE roots include gelingen (to turn out well, go smoothly) in German, light and lever in English, licht (light, easy, mild) in Dutch, and léim (to jump, leap) in Irish [source].

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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