Where does “ša” come from?

ša (Serbo-Croatian) comes from Serbo-Croatian šta, 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.

Ancestry of “ša”, step by step

ša traces back through two separate lines of ancestry.

via Serbo-Croatian šta

StepLanguageWordMeaning
1Serbo-Croatianštawhat
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 Akkadian šu

StepLanguageWordMeaning
1Akkadianšuhe

Words derived from “ša

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