Where does “per(i)” come from?

per(i) (Proto-Albanian) comes from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “per(i)”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	per-	before, in front; first; to go through
2	Proto-Indo-European	pr̥tós	passed , crossed

per(i) — Etymology, Origin & Word History | Etymology Explorer