Where does “що” come from?

що (Bulgarian) comes from Bulgarian защо, from Proto-Slavic čьto, from Proto-Balto-Slavic ki, from Proto-Indo-European kʷíd, from Proto-Indo-European kʷís, from Proto-Indo-European kʷi- — interrogative base.

що (Bulgarian): that, which; what; why

Definitions

  1. that, which; what; why

Ancestry of “що”, step by step

що traces back through two separate lines of ancestry.

via Bulgarian защо

StepLanguageWordMeaning
1Bulgarianзащоwhy (for what reason)
2Proto-Slavicčьtowhat
3Proto-Balto-Slavickiwhat
4Proto-Indo-Europeankʷídneuter nominative/accusative singular of *kʷís
5Proto-Indo-Europeankʷíswho, what; who, which, that; which, what
6Proto-Indo-Europeankʷi-interrogative base

via Old Church Slavonic чьто

StepLanguageWordMeaning
1Old Church Slavonicчьтоwhat (interrogative)

Words derived from “що

Every word from Proto-Indo-European kʷi-Every word from Proto-Indo-European kʷísEvery word from Proto-Indo-European kʷíd