Where does “закваска” come from?

закваска (Russian) comes from Russian заква́сить, from Russian за́-, from Proto-Slavic za- — for.

закваска (Russian): leaven, ferment, barm; mold; stuff

Definitions

  1. leaven, ferment, barm; mold; stuff

Ancestry of “закваска”, step by step

закваска traces back through two separate lines of ancestry.

via Russian заква́сить

StepLanguageWordMeaning
1Russianзаква́ситьto ferment, to leaven
2Russianза́-behind, beyond
3Proto-Slavicza-for

via Ukrainian заква́сити

StepLanguageWordMeaning
1Ukrainianзаква́сити—
Every word from Proto-Slavic za- →Every word from Russian за́- →Every word from Russian заква́сить →