Words for lip, mouth & throat in Celtic languages.

Proto-Celtic	*wewlos = lip
Old Irish (Goídelc)	bél [bʲeːl] = lip, mouth, opening
Irish (Gaeilge)	béal [bʲia̯l̪ˠ / bʲeːlˠ] = mouth, opening, entrance, lip, edge, sound, front, face, beginning
Scottish Gaelic (Gàidhlig)	beul [bial̪ˠ] = mouth, beginning, opening, edge, gunwale, oral
Manx (Gaelg)	beeal [ˈbiəl] = mouth, muzzle, rictus, flue, outlet, orifice, cone, crater, rim, approach, passage
Proto-Brythonic	*gweβl = lip
Welsh (Cymraeg)	gwefl = lip (of an animal), jaws, chaps
Cornish (Kernewek)	gwevel = lip
Breton (Brezhoneg)	guefl = lip

Words marked with a * are reconstructions.

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, Geiriadur Prifysgol Cymru, Dictionnaire Favereau

Proto-Celtic	*moniklo- = neck
Old Irish (Goídelc)	muinél = neck, narrow part
Irish (Gaeilge)	muineál [ˈmˠɪnɑːl] = neck
Scottish Gaelic (Gàidhlig)	muineal [mun̪ʲəl̪ˠ] = neck
Manx (Gaelg)	mwannal [ˈmonal] = neck
Welsh (Cymraeg)	mwnwgl = neck

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary, Teanglann.ie, Geiriadur Prifysgol Cymru

Welsh (Cymraeg)	gwddf [ɡʊðv / ˈɡuːðu] = neck, crag; throat gwddw [ˈɡʊðʊ / ˈɡuːðu] = neck, crag; throat gwddwg [ˈɡuːðu / ˈɡuːðuɡ] = neck, crag; throat
Old Breton	guodoc = throat, neck
Breton (Brezhoneg)	gouzoug = throat, neck

Sources: Wiktionary, Geiriadur Prifysgol Cymru, Dictionnaire Favereau

Welsh (Cymraeg)	ceg [keːɡ] = throat, gullet, windpipe, neck; mouth, opening, entrance; roup, pip; thrush

Sources: Wiktionary, Geiriadur Prifysgol Cymru