Where does “goañvoù” come from?

goañvoù (Breton) comes from Breton goañv, from Middle Breton gouaff, from Old Breton guoiam, from Proto-Celtic gyemos, from Proto-Indo-European ǵʰyem- — winter.

Definitions

Ancestry of “goañvoù”, step by step

Step	Language	Word	Meaning
1	Breton	goañv	winter
2	Middle Breton	gouaff	—
3	Old Breton	guoiam	—
4	Proto-Celtic	gyemos	winter
5	Proto-Indo-European	ǵʰyem-	winter

Every word from Proto-Indo-European ǵʰyem- →

goañvoù — Etymology, Origin & Word History | Etymology Explorer