Where does “dosypować” come from?

dosypować (Polish) comes from Polish dosypać, from Old Polish dosypać, from Old Polish do-, from Proto-Slavic do-.

Ancestry of “dosypować”, step by step

StepLanguageWordMeaning
1Polishdosypaćto add by sprinkling
2Old Polishdosypaćto fill by sprinkling
3Old Polishdo-appended to verbs to indicate completion
4Proto-Slavicdo-—
Every word from Proto-Slavic do- →Every word from Old Polish do- →Every word from Old Polish dosypać →