Where does “pr̥ṣṭʰás” come from?

pr̥ṣṭʰás (Proto-Indo-Aryan) comes from Proto-Indo-Iranian pr̥štʰás, from Proto-Indo-European pr̥-sth₂-ós, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “pr̥ṣṭʰás”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iranianpr̥štʰásback
2Proto-Indo-Europeanpr̥-sth₂-ós
3Proto-Indo-Europeanper-before, in front; first; to go through
4Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “pr̥ṣṭʰás

Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European pr̥-sth₂-ós