Books

Words for book and related things in Celtic languages:

The Library, Trinity College - Dublin, Ireland

Old Irish (Goídelc) lebor [ˈl͈ʲevor] = book
lebrán = little book, booklet
Middle Irish (Gaoidhealg) lebar, lebor = book, volume, treatise, charter
lebarda, lebur(da) = bookish, learned, lettered, of or belonging to books
lebarach = of or belonging to books, written
lebrán = little book, handbook, copy, transcript
lebróir = (book) peddlar, merchant
Irish (Gaeilge) leabhar [l̠ʲəuɾˠ / l̠ʲoːɾˠ] = book
leabharbhách = bibliophile
leabharbhoth = bookstall
leabhareolaí = bibliographer
leabharlann = library
leabharlannaí = librarian
leabharach = bookish
leabharagán = bookcase
leabharán = booklet
leabharóg = libretto
Scottish Gaelic (Gàidhlig) leabhar [l̪ʲo.ər] = book, volume, the Bible
leabhar-lann = library
leabhar-lannaiche = librarian
leabhar-latha = diary, journal
leabhar-pòcaid = pocketbook, wallet
leabhar-chlàr = bibliography
leabhar-d = e-book
leabhar mór-eòlais = encyclopedia
Manx (Gaelg) lioar = book, tome, volume, folio
lioaran = booklet, brochure, pamphlet, tract
lioaragh = bookish, lettered, studious, booklearned, well-read
lioaraghan = bookcase
lioarlagh = collection of books
lioarlan(n) = library
lioarlannee = librarian
lioarvark = bookmark
Proto-Brythonic *llɨβr = book
Middle Welsh (Kymraec) llyvir, llyther, llyuyr, llyvyr = book, volume
llyvran = small book, booklet, pamphlet
llyfrbry, llyvrbryv = bookworm
Welsh (Cymraeg) llyfr [ɬɨ̞vr / ɬɪvr] = book, volume
llyfraf, llyfro, llyfru = to book, enter in a book, record, register, enrol
llyfran = small book, booklet, pamphlet
llyfrbryf = bookworm
llyfrdy = library, study, collection of books, bookshop
llyfreugar = fond of books
llyfrgar = bookish, studious
llyfrgell = library, study, bookshop
llyfrgellydd = librarian, book collector
llyfrifwr = book-keeper
llyfrnod = bookmark
Old Cornish liuer = book
Middle Cornish (Cernewec) levar, liver, lyvyr = book
levarva = library, bookcase
Cornish (Kernewek) lyver, lever = book
lyver dedhyow = calendar
lyver kuntel = album
lyver termyn = magazine, periodical
lyverji = bookshop
lyverva = library
lyveras, lyverades = librarian
lyvrik, lyvryn = booklet
Old Breton libr = book
Middle Breton (Brezonec) leffr, leur, leufr, levvr, levr = book
levr-dourn = manual, handbook
Breton (Brezhoneg) levr = book
levr-dorn = manual, handbook
levr-skrid = manuscript
levraoua = to look for books
levraoueg, levrdi = library
levraouegour, levrdiour = librarian
levraouek = full of books
levraouer = bibliophile, book lover
levraouerezh = bibliophilia

Etymology: from the Latin liber (book, the inner bark of a tree), from Proto-Italic *lufros, from the Proto-Indo-European *lubʰrós, from *lewbʰ- (to peel, cut off, harm). Words from the same roots include libel, library, leaf and lobby in English, and librairie (bookshop, tobacconist’s) in French [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

Floor / Ground

Words for floor, ground and related things in Celtic languages.

The floor in my attic

Proto-Celtic *ɸlārom = floor
Old Irish (Goídelc) lár = surface, middle
airlár = floor
Middle Irish (Gaoidhealg) lár = surface, middle, interior
airlár, erlar, irlár, urlar = level surface, floor
Irish (Gaeilge) lár [l̪ˠɑːɾˠ / l̪ˠæːɾˠ] = ground, floor, middle, centre
láraigh = to centralize
lárnach = central, medial, innermost
lárú = centralization
urlár = floor, level surface, bottom surface
Scottish Gaelic (Gàidhlig) làr [l̪ˠaːɾ] = floor, ground, storey, middle, centre
làr-dannsa = dance floor
làr-ionad = hub
ùrlar = floor(ing), motif, theme, ground movement, groundwork
Manx (Gaelg) laare = flat, level, set, sill, centre, bottom, deck, floor, storey, flatness
laaraghey = centralization, to centralize, to floor, to lay (a floor)
laareagh = floored, flooring
laarit = floored
laare hallooin = ground floor
laare skyrraghtyn = skating rink
brat laare = carpet
Proto-Brythonic *lọr [ˈlɔːr] = floor
Old Welsh laur = floor
Middle Welsh (Kymraec) llaur, llawr = floor
Welsh (Cymraeg) llawr [ɬau̯r] = floor, deck, gallery, stage, platform, cellar, basement, ground, bottom (of sea)
llawr isaf = ground floor
llawr llofft = upstairs floor
llawr uchaf = top floor, top storey
llawr sglefrio = skating rink
Old Cornish lor = floor
Middle Cornish (Cernewec) leur, luer, lêr = floor, pavement, ground floor, ground, earth
Cornish (Kernewek) leur = floor, ground, storey
leur a-woles = ground floor
leurlen = carpet
leuredh = area
Old Breton lor = floor
Middle Breton (Brezonec) leur = area, location, floor, ground
leuzr carr = plateau, cart bed
Breton (Brezhoneg) leur = floor, ground, area
leurenn = stage
leurennañ = to stage, set the scene
leurenner = director

Etymology: from the Proto-Indo-European word *pleh₂- (to be flat), which is also the root of the English word floor [source].

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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, Lexicon Cornu-britannicum: A Dictionary of the Ancient Celtic Language of Cornwall, Dictionaire Favereau, TermOfis, Le dictionnaire diachronique du breton, Geriafurch, English – ProtoCeltic WordList (PDF), Etymological Dictionary Of Proto Celtic

Whistling Winds

Words for wind and whistle in Celtic languages.

Windy

Proto-Celtic *gaytā = wind
Old Irish (Goídelc) gaíth = wind
Middle Irish (Gaoidhealg) gáeth [ɡaːi̯θ] = wind
Irish (Gaeilge) gaoth [ɡeːh / ɡiːh] = wind, breeze, flatulence
gaothach = windy
gaothaire = vent, ventilator
gaothraigh = to fan, flutter (in breeze)
gaothráil = fanning, waving, fluttering
gaothscáth = windscreen
Scottish Gaelic (Gàidhlig) gaoth [gɯː] = wind, breeze, flatulence
gaoth-chuairtlein = whirlwind
gaoth-mhór = gale, strong wind
gaoth-sgàth = windscreen
gaothach = windy, flatulent, pneumatic
gaothmhor = gusty, windy, blustering, blustery, flatulent
Manx (Gaelg) geay [ɡiː] = wind, flatulence
geayeeagh = windy, blowy, breezy

Etymology: from the Proto-Indo-European *ghai / *ghei / *ghi (drive, storm) [source].

Proto-Celtic *wintos = wind
Old Irish (Goídelc) fet [fʲed] = whistling, hissing, the sound of a sword cleaving the air; pipe (musical intrument)
Irish (Gaeilge) fead [fʲad̪ˠ] = whistle
feadáíl = whistling
feadaire = whistler
feadánacht = whistling, piping, wheezing
feadóg = (tin) whistle, plover, tall thin woman
Scottish Gaelic (Gàidhlig) fead [fed] = whistle, hiss
feadag = whistle
feadaire = whistler
feadalaich = whistling
Manx (Gaelg) fed [ɡiː] = toot, blast on whistle, zip, swish
feddagh = whistler
feddanagh = whistle
feddanys = whistling
Proto-Brythonic *gwɨnt [ˈɡwɨnt] = wind
Middle Welsh (Kymraec) gwynt = wind
Welsh (Cymraeg) gwynt [ɡwɨ̞nt / ɡwɪnt] = wind, blast, gale, stiff breeze, current of air, air, bellows, bombast, pride; empty talk, mere words
gwyntio = to blow, blast, breathe, sniff, snort, fart
gwynt(i)og = windy, breezy, stormy, wind-swept, wind-tossed, wind-blown, flatulent
Old Cornish guins = wind
Cornish (Kernewek) gwyns = wind
gwyns skav = breezy
gwynsek = windy
gwynsell = fan
gwynsella = to fan
melin wyns = windmill
Middle Breton guent = wind
Breton (Brezhoneg) gwent = wind (literary / archaic), gas, flatulence
gwentadur ventilation

Etymology: from the Proto-Indo-European *h₂wéh₁n̥ts (blowing) [source], which is also the root of words for wind in Germanic, Romance and Indo-Iranian languages.

Proto-Celtic *awelā = breeze, wind, breath
Proto-Brythonic *awel = breeze, wind
Gaulish aurarum = wind
Middle Welsh (Kymraec) avel / awel = wind, air, weather
Welsh (Cymraeg) awel = (light) wind, breeze, air, weather
awelu = to blow, flow, breathe
awelaidd = breezy, fresh (wind)
awelan = (gentle) wind
awelig (light) breeze
awelog = breezy, windy, squally, airy, flatulent
Old Cornish auhel = wind
Cornish (Kernewek) awel = gale, weather wind
awel glor = breeze
hager awel = bad weather, squall, storm, tempest
Old Breton auelou / auel = wind
Breton (Brezhoneg) avel [ˈɑːvɛl / ˈɑːwɛl] = wind

Etymology: from the Proto-Indo-European *h₂ewh₁eleh₂ from *h₂weh₁- (to blow) [source], which is also the root of English words such as fan, vent, weather and wind.

Words marked with a * are reconstructions.

Here’s a tune I wrote a few years ago that seems approiate for this post: The Whistling Windows / Y Ffenstri Sïo

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

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Willow (trees)

Words for willow tree (salix) in Celtic languages:

Old Irish (Goídelc) sail = willow (tree), plank, beam
Irish (Gaeilge) saileach = willow (tree), sallow
Scottish Gaelic (Gàidhlig) seileach [ʃeləx] = willow (tree)
Manx (Gaelg) shellagh = willow (tree), proliferous, sallow, salivary, withy
Welsh (Cymraeg) helyg [ˈhɛlɪɡ / ˈheːlɪɡ] = willow (tree), osier
Cornish (Kernewek) helygk [ˈhɛlɪk] = willow (tree)
Breton (Brezhoneg) haleg = willow (tree)

Words marked with a * are reconstructions.

Etymology: from the Proto-Indo-European salək- (willow).

Sources: https://en.wiktionary.org/wiki/salix#Latin, Am Faclair Beag, teanglann.ie, On-Line Manx Dictionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau

Willow Tree Reflection

Ash (trees)

Words for ash tree (fraxinus) in Celtic languages:

Proto-Celtic *osnistū / *osnos = ash tree
Old Irish (Goídelc) uinnius [ˈun͈ʲus] = ash (tree)
fuinnseóc = ash tree
Irish (Gaeilge) fuinseog = ash (tree), ash-handled implement
Scottish Gaelic (Gàidhlig) uinnseann [ũĩn̪ʲʃən̪ˠ] = ash (tree), ash wood
fuinnseag = European / common ash (tree)
Manx (Gaelg) unjin = ash (tree)
Welsh (Cymraeg) onn [ɔn] = ash (tree / wood), spear
Old Cornish onnen = ash (tree)
Cornish (Kernewek) onn = ash (tree)
Breton (Brezhoneg) onn = ash (tree)

Words marked with a * are reconstructions.

Etymology: from the Proto-Indo-European *h₃es-nos from *h₃es (ash tree).

Sources: Wiktionary, Am Faclair Beag, teanglann.ie, On-Line Manx Dictionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau

ash tree

Birch (trees)

Words for birch (tree) (Betula) in Celtic languages:

Proto-Celtic *betwiyos / *betuyā = birch (tree)
Old Irish (Goídelc) beithe = birch (tree)
Irish (Gaeilge) beith = birch (tree)
Scottish Gaelic (Gàidhlig) beith [beh] = birch
Manx (Gaelg) beih = birch (tree)
Proto-Brythonic *bedu = birch (tree)
Middle Welsh (Kymraec) bedw = birch
Welsh (Cymraeg) bedw [ˈbɛdʊ / ˈbeːdu] = birch, birch grove; maypole; birch-rod
Old Cornish bedewen = birch
Cornish (Kernewek) besewen = birch
Middle Breton bezu = birch
Breton (Brezhoneg) bezv = birch

Etymology: from the Proto-Indo-European *gʷet- (resin, gum) [source], which is also the root of the English words cud and quid.

Words marked with a * are reconstructions.

Sources: Wiktionary, Am Faclair Beag, teanglann.ie, On-Line Manx Dictionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau

Birch Trees

Oak (trees)

Words for oak (Quercus) in Celtic languages:

Proto-Celtic *daru [d̪ˠaɾʲ] = oak
Gaulish Dervo = used in placenames
Old Irish (Goídelc) dair [d̪ˠaɾʲ] = oak
Irish (Gaeilge) dair [d̪ˠuːnˠ] = oak
doire [ˈd̪ˠɛɾʲə] = oak-wood; wood, grove, thicket
Scottish Gaelic (Gàidhlig) dair [darʲ] = oak (archaic)
darach [darəx] = oak, oaken, made of oak; ship (poetic)
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 = oak
Welsh (Cymraeg) dâr [ˈdaːr] = oak tree, foremost warrior, leader, mighty lord
derwen [ˈdɛrwɛn] = oak tree
derw = oak trees
Old Cornish dar = oak
Cornish (Kernewek) dar [daːr / dæːr] = oak
derwen = oak tree
derw = oak trees
Old Breton dar / daeru = oak
Breton (Brezhoneg) derv = oak

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

Words marked with a * are reconstructions.

Sources: Wiktionary, Am Faclair Beag, teanglann.ie, On-Line Manx Dictionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau

oak

Fields, Meadows and Pastures

There are a number of words for fields, meadows and pastures in Celtic languages. Some appear only or mainly in placenames. Here’s a selection:

Roman Camp

Words marked with a * are reconstructions.

Old Irish (Goídelc) achad = expanse of ground; pasture, field; field of battle
Middle Irish (Gaoidhealg) achad = expanse of ground; pasture, field
Irish (Gaeilge) achadh [ˈaxə/ˈaxuː] = field (archaic, used mainly in placenames)
Scottish Gaelic (Gàidhlig) achadh [axəɣ] = field, plain, meadow; cornfield newly cut or ready for reaping
achadh-feòir = hayfield
achadh-guail = coalfield
bàn-achadh = fallow field

Etymology: unknown, possibly related to the Latin acnua (a measure or piece of land, 120 feet square) [source].

Proto-Celtic *gortos = fence, enclosure, pen
Old Irish (Goídelc) gort = field, orchard, crop
Middle Irish (Gaoidhealg) gort = field (arable or pasture land), field of battle, land, territory, standing corn
guirtine = a little garden
Irish (Gaeilge) gort [ɡɔɾˠt̪ˠ] = (cultivated) field, orchard, (standing) crop
gortbhriseadh = tilling a field, tillage
gortghlan = to clear (a field) of weeds, to weed out
gortghlanadh = clearance (of a field), weeding
gortghlantóir = weeder
Scottish Gaelic (Gàidhlig) gort [gɔrˠʃd] = standing corn; enclosure; small field
Proto-Brythonic *gorθ = field
Welsh (Cymraeg) garth = field, close, enclosure, fold, pen, yard; fort
garthan = entrenchment, encampment, camp, stronghold, field of battle
gartheiniad = camp defender
Cornish (Kernewek) gorth = field
Old Breton orz = field
Breton (Brezhoneg) garz = field

Etymology: from the Proto-Indo-European *ǵʰortós (enclosure, hedge) [source], which is also the root of words yard and garden in English, via the Proto-Germanic *gardaz (enclosure, court, yard, garden) [source].

Old Irish (Goídelc) macha = milking-yard
Middle Irish (Gaoidhealg) macha, machad = an enclosure for milking cows, a milking-yard or field
Irish (Gaeilge) machaire = plain; stretch of level ground, links, course; field
Scottish Gaelic (Gàidhlig) machair [maxɪrʲ] = extensive low-lying fertile plain, level country; extensive beach; ow and level part of a farm
Manx (Gaelg) magher = field, fertile land, campaign, chase, machar, sphere

Etymology: possibly from the Latin mācĕria (wall, enclosure) [source].

Proto-Celtic *rowesyā- = field, open ground
Old Irish (Goídelc) róe [r͈oːi̯] = battle-field, level piece of ground, fight, battle
Middle Irish (Gaoidhealg) róe, roe = a level piece of grand, a battle field, battle, a rout, fight
Irish (Gaeilge) [rˠeː] = stretch of ground, level ground, field
Scottish Gaelic (Gàidhlig) raon [rˠɯːn] = field, (piece of) ground; plain; zone, area; field (of expertise); ambit
Manx (Gaelg) rheam = gamut, range, field, monarchy
Old Breton runt = mound
Breton (Brezhoneg) run = mound, hill

Etymology: from the Proto-Indo-European *Hrew(H)os (open space, field). The English words rustic and rural come from the same root, via Latin [source].

Proto-Celtic *kagyom = pen, enclosure
Gaulish cagiíun / *kagyom = enclosure
Old Irish (Goídelc) cai = field, orchard, crop
Irish (Gaeilge) [kʲeː] = quay
Scottish Gaelic (Gàidhlig) cidhe [kʲi.ə] = quay
cidhe-tìreachaidh = wharf
cidhe-bathair = goods wharf
Manx (Gaelg) keiy = jetty, quay(side), wharf
Proto-Brythonic *kaɨ = animal pen, enclosure, field
Middle Welsh (Kymraec) kay / kae = field, enclosure
Welsh (Cymraeg) cae [kaːɨ̯ / kai̯] = hedge, hedgerow, fence; field, enclosure; circle, sphere; barrier, obstruction
caead = lid, cover, shutter, flap, shell, case, enclosure, case, wall, fence, hedge, field, buckle, clasp, fastener, valve
caeadu = to bind, cover (a book), stop, close
cei [kei̯] = quay
Cornish (Kernewek) ke = hedge, fence
kay = quay
Old Breton cai = hedge
Middle Breton quae = hedge
Breton (Brezhoneg) kae = hedge, quay

Etymology: from the Proto-Indo-European *kagʰyóm (enclosure, hedge) [source], which is also the root English words quay and hedge [source].

The Irish, Scottish Gaelic and Manx words for quay come from the same Proto-Celtic root, via the Anglo-Norman kay, cail (quay, wharf) and Gaulish [source]. The Welsh and Cornish words for quay also come from the same Proto-Celtic root, via Middle English, Old French and Gaulish [source].

Proto-Celtic *magos = plain, field
Gaulish *magos = field
Old Irish (Goídelc) mag [maɣ] = plain, field
ármag, árbach, ármach = field of slaughter, battlefield
Middle Irish (Gaoidhealg) mag, maig = plain, open stretch of land
Irish (Gaeilge) [mˠɑː / mˠæː] = plain
Scottish Gaelic (Gàidhlig) magh [mɤɣ] = level country, plain
Magh Meala = Land of (Milk and) Honey (in mythology)
Magh Meall = elysium
magh na bàire = the plain of battle
Manx (Gaelg) magh = plain
Middle Welsh (Kymraec) mais, maes, meys = open country, plain, field
Welsh (Cymraeg) maes [maːɨ̯s / mai̯s] = open country, level land, plain; field; battle, victory, supremacy; out, away, off, outside, out of doors
maesol = rural, agrarian
maestref = suburb, country town, village, hamlet
maestrefol = suburban
Middle Cornish (Cernewec) maes, mes, meas, meys = open country, plain, field
Cornish (Kernewek) mes = open country
mestrev = suburb
mesya = to field
Old Breton maes = countryside, outside
Breton (Brezhoneg) maez = countryside, open field, outside, wide

Etymology: possibly from the Proto-Indo-European *meǵh- (great) [source].

Proto-Celtic *klowni = meadow
Old Irish (Goídelc) clúain = meadow
Middle Irish (Gaoidhealg) clúain, clóin = meadow, pasture-land, glade
Irish (Gaeilge) cluain = meadow
Scottish Gaelic (Gàidhlig) cluain [kl̪uən̪ʲ] = green field, pasture, meadow
Old Welsh clun = meadow, moor
Middle Welsh (Kymraec) clun = meadow, moor
Welsh (Cymraeg) clun [klɨːn / kliːn] = meadow, moor; brake, brushwood

Etymology: possibly from the Proto-Indo-European *klopni (wet).

Old Irish (Goídelc) áirge [ˈaːrʲɣʲe] = a place for milking cows
Middle Irish (Gaoidhealg) áirge, arigi, airge = a place for milking cows, byre, cowshed, herd of cattle
áirgech = having numerous herds, herdsman
Irish (Gaeilge) áirí = milking-place, herd (of cows), ground manured in previous year; ground from which potatoes have been cropped
Scottish Gaelic (Gàidhlig) àirigh [arʲɪ] = hill pasture, bothy, sheiling, pastoral summer residence
àirigheach [aːrʲɪjəx] = bounding in hill pastures. bothies or shielings
àirigheachd [aːrʲɪjəxg] = transhumance
Manx (Gaelg) eairee = hill pasture, shieling

Etymology: from Old Irish árach, from ad·rig (to tie, bind). The Faorese word ærgi [ˈaɹt͡ʃɪ] (a pasture for cattle to graze over the summer with a hut where the people tending them live meanwhile; a shieling, saeter) also come from the same roots [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, Lexicon Cornu-britannicum: A Dictionary of the Ancient Celtic Language of Cornwall, Dictionaire Favereau, TermOfis, Le dictionnaire diachronique du breton, Etymological Dictionary Of Proto Celtic

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Food

Words for food and related things in Celtic languages.

Welsh Rarebit

Words marked with a * are reconstructions.

Proto-Celtic *bētom = food
Old Irish (Goídelc) bíad [bʲiːa̯ð] = food
banbíad = dairy products
Middle Irish (Gaoidhealg) biad, bíad = food,
bánbiad = dairy products
berbiad = to boil, cook, melt, dissolve
bíadamail = nourishing, nutritive
bíadmar = abounding in food
Irish (Gaeilge) bia [bʲiə] = food, substance
biachlár = menu
biathaigh = to feed, shower
bia-eolaí = dietician
biamhar = abounding in food
Scottish Gaelic (Gàidhlig) biadh [biəɣ] = food, fare, repast, viand, victual, feed, a meal
biadhachadh = (act of) feeding, nourishing, baiting
biadhchar = fruitful, productive, wholesome, nutritious
biadhmhor = nutritious
biadhta = fed, nourished, baited
biadhtach = feeder, grazer, hospitable person, supplier, provider, glutton
biadhtachd = hospitality
Manx (Gaelg) bee [biː] = diet, feed, food, nourishment, provisions
beiyhaghey = feeding
beaghee = nutritious
beaghit = fed, maintained
beaghey = to feed, nourish, nuture, maintain; food, nutrition, sustenance
Proto-Brythonic *buɨd [ˈbuɨ̯d] = food
Middle Welsh (Kymraec) bvid, bwyt, bwyd = food
bwydo, bwyda = to feed, nourish
bwydlawn = satiated, full of food
Welsh (Cymraeg) bwyd [buːɨ̯d / bʊi̯d] = food, nourishment, meat, victuals, provisions
bwydaf, bwydo, bwyda = to feed, nourish
bwydfa = eating-house, restauarant, hotel, inn
bwydlon, bwydlon = satiated, full of food
bwydwr = feeder, provider
Old Cornish buit = food
Middle Cornish (Cernewec) buit, boys, bôs = meat, food
Cornish (Kernewek) boos [ˈbɔːz] = food, meal, fare
boos bestes = feed, fodder
bosa = to feed
bosti = restaurant
Middle Breton boet, boed, bouet = food
boedec, boëdecq = fleshy, soft, pulpy, fodder
Breton (Brezhoneg) boued = food, eat, edible, bait, flesh (of fish), marrow, pulp, substance
bouetaj = (animal) feed, fodder
bouedañ = to feed, supply
bouedek = fleshy, soft, pulpy, fodder

Etymology: from the Proto-Indo-European *gʷeyh₃tom, from *gʷeyh₃- (to live) [source].

Words from the same roots include biology, biology, hygiene, quick, vital and zoo in English [source], and words for alive and living and life in Celtic languages.

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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, Lexicon Cornu-britannicum: A Dictionary of the Ancient Celtic Language of Cornwall, Dictionaire Favereau, TermOfis, Le dictionnaire diachronique du breton, Etymological Dictionary Of Proto Celtic

Death

Words for death in Celtic languages.

Proto-Celtic *bāstom / bāssom = death
Old Irish (Goídelc) bás [baːs] = death
Irish (Gaeilge) bás [bˠɑːsˠ / bˠæːsˠ] = death
Scottish Gaelic (Gàidhlig) bàs [baːs] = death, decease, demise
Manx (Gaelg) baase [bɛːs] = death

Etymology: from the Proto-Indo-European *gʷeh₂- (to go) [source].

Sources: Wiktionary, Am Faclair Beag, On-Line Manx Dictionary, Teaglann.ie

Proto-Celtic *marwos = dead
Old Irish (Goídelc) marb = dead; mortified, insensible, spiritually dead; inanimate; stagnant (water)
Irish (Gaeilge) marbh [ˈmˠɑɾˠəvˠ / ˈmˠarˠuː / ˈmˠarˠu] = dead person, death, defunct
Scottish Gaelic (Gàidhlig) marbh [marav] = dead person, the dead
Manx (Gaelg) marroo = dead, lifeless, inanimate, glassy (look), muggy, dull, dud, stagnant, defunct, mortified, slaughtered, departed, deceased, killed, extinct
merriu = dead men, departed souls
Proto-Brythonic *marw = dead
Welsh (Cymraeg) marw = dead, deceased, inanimate
marwolaeth = death, decease, demise; suffering, tribulation; deadly plague or pestilence, fatal disease
Cornish (Kernewek) mernans = death
Breton (Brezhoneg) marv = death

Etymology: from Proto-Indo-European *mer- (to die, disappear) [source].

Sources: Wiktionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau

Proto-Celtic *ankus = death
Old Irish (Goídelc) éc = death
Irish (Gaeilge) éag = Death, numbness, powerlessness
Scottish Gaelic (Gàidhlig) eug [eːg] = death, Death, ghost, spectre
Middle Welsh (Kymraec) angheu = death
Welsh (Cymraeg) angau = death, decease, demise, annihilation, cessation, mortal danger
Old Cornish ancou = death
Cornish (Kernewek) ankow = death
Old/Middle Breton ancou = death
Breton (Brezhoneg) ankow = death

Etymology: from Proto-Indo-European *nek̂- (to perish, disappear) [source].

Sources: Wiktionary, Am Faclair Beag, On-Line Manx Dictionary, Teaglann.ie, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau