Where does “вꙑ-” come from?

вꙑ- (Old East Slavic) comes from Proto-Slavic vy-, from Proto-Balto-Slavic ū́, from Proto-Indo-European úd — out, outward.

Ancestry of “вꙑ-”, step by step

StepLanguageWordMeaning
1Proto-Slavicvy-out
2Proto-Balto-Slavicū́—
3Proto-Indo-Europeanúdout, outward

Words derived from “вꙑ-”

Every word from Proto-Indo-European úd →Every word from Proto-Balto-Slavic ū́ →Every word from Proto-Slavic vy- →