Where does “fothair” come from?

fothair (Irish) comes from Old Irish foithir, from Old Irish fo, from Proto-Celtic uɸo, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

fothair (Irish): dingle

Definitions

dingle

Ancestry of “fothair”, step by step

Step	Language	Word	Meaning
1	Old Irish	foithir	a piece of unreclaimed valley or wooded land
2	Old Irish	fo	under, beneath; towards; through, throughout
3	Proto-Celtic	uɸo	under, below
4	Proto-Indo-European	upó	under, below
5	Proto-Indo-European	h₃ewp-	—

Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Celtic uɸo →