Where does “-вши” come from?

-вши (Ukrainian) comes from Proto-Slavic -vъ, from Proto-Balto-Slavic *-was, from Proto-Indo-European -wós — Creates adjectives from verb stems.

Ancestry of “-вши”, step by step

StepLanguageWordMeaning
1Proto-Slavic-vъFrom thematic declension of u-stem...
2Proto-Balto-Slavic*-was—
3Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wós →Every word from Proto-Slavic -vъ →Every word from Proto-Balto-Slavic *-was →
-вши — Etymology, Origin & Word History | Etymology Explorer