Serbo-Croatian што

← Proto-Indo-European *kʷid (inherited)

← Proto-Indo-European *kʷis (mention)

← Proto-Slavic *čьto (inherited)

← Proto-Slavic *čь (mention)

→ Serbo-Croatian будшто (mention)

→ Serbo-Croatian крошто (mention)

→ Serbo-Croatian пошто (prefix)

→ Serbo-Croatian којешта (mention)