Words for to go in Celtic languages.

Note: this is one of the few irregular verbs in the celtic languages, and some different parts of the conjugations come from different roots.

Proto-Celtic	*tēgeti = to go, step
Old Irish (Goídelc)	téít [tʲeːdʲ] = to go, process, depart leave
Irish (Gaeilge)	téigh [tʲeːɟ / tʲeːj / tʲeː] = to go, move, proceed, get on, fare, make, cost
Scottish Gaelic (Gàidhlig)	tèid = will go – (future form of rach)

Etymology: from the Proto-Indo-European *stéygʰeti (to be walking, to be climbing) [Source].

Old Irish (Goídelc)	dul = to go, going
Irish (Gaeilge)	dul [d̪ˠʊlˠ] = going, passing, departure, way, method, means, proper, natural, arrangement, style – (verb noun of téigh)
Scottish Gaelic (Gàidhlig)	dol [dɔl̪ˠ] = (act of) going, (act of) proceeding
Manx (Gaelg)	goll = to go, show out, disembark, going, sinking, passage, departure

Etymology: unknown

Proto-Celtic	*monītor = go
Middle Irish (Gaoidhealg)	muinithir = goes around
Proto-Brythonic	*moned = go
Welsh (Cymraeg)	mynd [mɨ̞nd / mɪnd] = to go, leave, depart, die, disappear, perish, come to an end, elapse, pass
Cornish (Kernewek)	mos = to go, become
Breton (Brezhoneg)	monet = to go, to become

Etymology: from the Proto-Indo-European *menH- [Source].

Words marked with a * are reconstructions.

Sources: Wiktionary, Am Faclair Beag, MacBain’s Dictionary, In Dúil Bélrai English – Old-Irish Glossary, teanglann.ie, On-Line Manx Dictionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau