Where does “есен” come from?

есен (Bulgarian) comes from Old Church Slavonic ѥсень, from Proto-Slavic *esenь — autumn.

есен (Bulgarian): autumn; fall

Definitions

  1. autumn; fall

Ancestry of “есен”, step by step

StepLanguageWordMeaning
1Old Church Slavonicѥсеньautumn
2Proto-Slavic*esenьautumn
Every word from Proto-Slavic *esenь →Every word from Old Church Slavonic ѥсень →
есен — Etymology, Origin & Word History | Etymology Explorer