Where does “kírwis” come from?

kírwis (Proto-Balto-Slavic) comes from Proto-Balto-Slavic kírmis, from Proto-Indo-European kʷŕ̥mis — worm.

Ancestry of “kírwis”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavickírmisworm
2Proto-Indo-Europeankʷŕ̥misworm
Every word from Proto-Indo-European kʷŕ̥mis →Every word from Proto-Balto-Slavic kírmis →