Where does “się” come from?

się (Polish) comes from Proto-Slavic sę, from Proto-Balto-Slavic *sen, from Proto-Indo-European swé — self.

się (Polish): oneself, themselves, self; each other, one...

Definitions

  1. oneself, themselves, self; each other, one...

Ancestry of “się”, step by step

StepLanguageWordMeaning
1Proto-Slavicsęoneself: myself, yourself, himself, herself,...
2Proto-Balto-Slavic*senoneself
3Proto-Indo-Europeanswéself

Words derived from “się”

Every word from Proto-Indo-European swé →Every word from Proto-Balto-Slavic *sen →Every word from Proto-Slavic sę →