Where does “*pawwa” come from?

*pawwa (Proto-Nuristani) comes from Proto-Indo-Iranian pr̥Hwás, from Proto-Indo-European pr̥h₂wós, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “*pawwa”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iranianpr̥Hwásbefore, first, in front of; ancient, old
2Proto-Indo-Europeanpr̥h₂wósfirst
3Proto-Indo-Europeanper-before, in front; first; to go through
4Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Proto-Indo-European pr̥h₂wós →