Where does “-o-” come from?

-o- (Polish) comes from Old Polish -o-, from Proto-Slavic -o-.

Ancestry of “-o-”, step by step

StepLanguageWordMeaning
1Old Polish-o-—
2Proto-Slavic-o-—

Words derived from “-o-”

Every word from Proto-Slavic -o- →Every word from Old Polish -o- →