Where does “հեռևոր” come from?

հեռևոր (Old Armenian) comes from Old Armenian հեռի, from Old Armenian հեռ-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “հեռևոր”, step by step

Step	Language	Word	Meaning
1	Old Armenian	հեռի	far; isolated, foreign; distant, far off, of long...
2	Old Armenian	հեռ-	far
3	Proto-Indo-European	per-	before, in front; first; to go through
4	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Old Armenian հեռ- →