Where does “sto” come from?

sto (Ingrian) comes from Russian что́, from Old East Slavic чьто, 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.

sto (Ingrian): that

Definitions

  1. that

Ancestry of “sto”, step by step

StepLanguageWordMeaning
1Russianчто́what
2Old East Slavicчьтоwhat?
3Proto-Slavicčьtowhat
4Proto-Balto-Slavickiwhat
5Proto-Indo-Europeankʷídneuter nominative/accusative singular of *kʷís
6Proto-Indo-Europeankʷíswho, what; who, which, that; which, what
7Proto-Indo-Europeankʷi-interrogative base
Every word from Proto-Indo-European kʷi- →Every word from Proto-Indo-European kʷís →Every word from Proto-Indo-European kʷíd →