Where does “беларуска” come from?

беларуска (Belarusian) comes from Belarusian -ка, from Proto-Slavic -ъka, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

Ancestry of “беларуска”, step by step

StepLanguageWordMeaning
1Belarusian-ка—
2Proto-Slavic-ъkaDenominal, forms diminutives; Deadjectival,...
3Proto-Indo-European-kosCreates deadjectival and desubstantival...
Every word from Proto-Indo-European -kos →Every word from Proto-Slavic -ъka →Every word from Belarusian -ка →