Where does “oszywać” come from?

oszywać (Polish) comes from Polish oszyć, from Polish o-, from Old Polish o-, from Proto-Slavic o(b)- — over.

Ancestry of “oszywać”, step by step

StepLanguageWordMeaning
1Polishoszyć—
2Polisho-prefix indicating a perfective verb
3Old Polisho-appears in front of some verbs meaning: to make something behave in a certain way, en-, be-, make
4Proto-Slavico(b)-over
Every word from Proto-Slavic o(b)- →Every word from Polish o- →Every word from Old Polish o- →