Where does “осенний” come from?

осенний (Russian) comes from Russian о́сень, from Old East Slavic осень, from Proto-Slavic *esenь — autumn.

осенний (Russian): autumn

Definitions

  1. autumn

Ancestry of “осенний”, step by step

StepLanguageWordMeaning
1Russianо́сеньautumn, fall
2Old East Slavicосеньautumn
3Proto-Slavic*esenьautumn
Every word from Proto-Slavic *esenь →Every word from Old East Slavic осень →Every word from Russian о́сень →