Where does “стъпна” come from?

стъпна (Bulgarian) comes from Bulgarian стъ́пя, from Proto-Slavic stǫpiti, from Proto-Indo-European stÁb-.

Ancestry of “стъпна”, step by step

StepLanguageWordMeaning
1Bulgarianстъ́пяto step
2Proto-Slavicstǫpitito step
3Proto-Indo-EuropeanstÁb-—
Every word from Proto-Indo-European stÁb- →Every word from Proto-Slavic stǫpiti →Every word from Bulgarian стъ́пя →