Words for yoke, bond and related things in Celtic languages.

Words marked with a * are reconstructions.

Proto-Celtic	*yugom = yoke *komyungis = (?)
Gaulish	*yugom = yoke (?) *Weryugos = personal name
Old Irish (Goídelc)	cuing = yoke
Middle Irish (Gaoidhealg)	cuing, coing = yoke, burden, duty, sway, discipline, behaviour
Irish (Gaeilge)	cuing [kiːɲɟ/kɪɲ] = yoke, bond, obligation, tie, beam, narrow neck of land (as between two lakes) cuingealach = jugular cuingigh = to yoke, enjoin cuingir = yoke, pair, couple, group, herd cuingleánach = yoked cuingrigh = yoke, couple
Scottish Gaelic (Gàidhlig)	cuing [kɯ̃ĩŋʲgʲ] = yoke, asthma, bond, obligation cuinge [kɯ̃ĩŋʲgʲə] = narrow place, passage, pass, difficulty, limitation cuingeach [kɯ̃ĩŋʲgʲəx] = asthmatic cuingeachadh [kɯ̃ĩŋʲgʲəxəɣ] = (act of) yoking, abridgement, constraining, restricting, constraint cuingeachail [kɯiŋʲgʲəxal] = limiting, restrictive cuingealach [kɯ̃ĩŋʲgʲəl̪ˠəx] = restricted, shackled, constricted
Manx (Gaelg)	quing = yoke, brace, team of oxen, (balance) beam quingaghey = to subjugate, yoke quingey = to yoke quingit = yoked
Proto-Brythonic	*jọw = yoke
Old Welsh (Kembraec)	iou = yoke
Middle Welsh (Kymraec)	iou, yeu, iau, jav = yoke
Welsh (Cymraeg)	iau [jaɨ̯/jai̯] = yoke, pair of oxen, sway, dominion, authority, discipline, oppression
Old Cornish	ieu = yoke
Middle Cornish (Cernewec)	yeu = yoke
Cornish (Kernewek)	yew = yoke war yew = onward
Middle Breton (Brezonec)	yeu, yau = yoke
Breton (Brezhoneg)	yev [jew] = yoke, servitude yevad = yoke, hitch, team, coupling yevan, yevañ = to yoke, subjugate, enslave

Etymology: from the Proto-Indo-European *yugóm (yoke) or *yung, from *yewg- (to join, yoke, tie together) [source]. Words from the same roots include adjunct, conjugate, join, jugular, junction, yoga and yoke in English, joindre (to join up, reach, contact) in French, and junto (together, joined, next to) in Spanish [source].

Proto-Celtic	*wedos = yoke, harness
Old Irish (Goídelc)	fedan = band, carrying, company, drawing feidid [ˈɸʲeðʲiðʲ] = to bring, lead
Middle Irish (Gaoidhealg)	fedan, feadhan, fedhain = (act of) carrying, conveying, carriage, harness, band, company, part, some feidid, fedid = to bring, lead, refer, apply
Irish (Gaeilge)	feadhain = band, troop, company
Scottish Gaelic (Gàidhlig)	feadhain = team of horses
Manx (Gaelg)	fwirran = staff, team
Middle Welsh (Kymraec)	gued, guet, gved, gwedd = yoke, harness guedu, gwedha = to be coupled with a yoke, be yoked gwedeu, guedeu = traces, draught-harness gwedhau = to submit, pay homage
Welsh (Cymraeg)	gwedd [ɡweːð] = yoke, harness, team (of horses, oxen, etc), bondage, captivity, submission, humility, homage, offspring, progeny, children gweddaf, gweddu = to be coupled with a yoke, be yoked, submit, humble oneself gweddau = traces, draught-harness

Etymology: from the Proto-Indo-European *wedʰ- (to bind, secure, pledge, guarantee, lead) [source]. Words from the same roots include gage, wage, wager and wed in English, Wette (bet) in German, and gage (pledge, guarantee, deposit) in French [source].

Old Irish (Goídelc)	mám [maːm] = yoke
Middle Irish (Gaoidhealg)	mám = yoke
Irish (Gaeilge)	mám = yoke

Etymology: ? [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