Where does “indisin” come from?

indisin (Old Irish) comes from Old Irish in·fét, from Proto-Celtic *weideti, from Proto-Indo-European weyd- — to see.

Ancestry of “indisin”, step by step

Step	Language	Word	Meaning
1	Old Irish	in·fét	—
2	Proto-Celtic	*weideti	—
3	Proto-Indo-European	weyd-	to see

indisin — Etymology, Origin & Word History | Etymology Explorer