Where does “per-” come from?

per- (Proto-Balto-Slavic) comes from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “per-”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanper-before, in front; first; to go through
2Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “per-”

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →