Where does “лётный” come from?

лётный (Russian) comes from Russian ле́то, from Old East Slavic лѣто, from Proto-Slavic lěto, from Proto-Indo-European leh₁tóm.

лётный (Russian): flying, flight

Definitions

  1. flying, flight

Ancestry of “лётный”, step by step

лётный traces back through two separate lines of ancestry.

via Russian ле́то

StepLanguageWordMeaning
1Russianле́тоyear; summer, year
2Old East Slavicлѣтоtime
3Proto-Slaviclětosummer; year
4Proto-Indo-Europeanleh₁tóm

via Russian лёт

StepLanguageWordMeaning
1Russianлётflight
Every word from Proto-Indo-European leh₁tómEvery word from Proto-Slavic lětoEvery word from Old East Slavic лѣто
лётный — Etymology, Origin & Word History | Etymology Explorer