Where does “затемнение” come from?

затемнение (Russian) comes from Russian затемни́ть, from Russian темни́ть, from Russian тёмный, from Proto-Slavic tьmьnъ, from Proto-Slavic tьma, from Proto-Balto-Slavic timāˀ, from Proto-Indo-European tēmH- — dark.

затемнение (Russian): darkening; blackout; blackout device

Definitions

  1. darkening; blackout; blackout device

Ancestry of “затемнение”, step by step

StepLanguageWordMeaning
1Russianзатемни́тьto darken, to black out
2Russianтемни́тьto darken, to make darker
3Russianтёмныйdark; ignorant, uneducated; obscure, vague
4Proto-Slavictьmьnъdark
5Proto-Slavictьmadark, darkness
6Proto-Balto-Slavictimāˀdarkness
7Proto-Indo-EuropeantēmH-dark
Every word from Proto-Indo-European tēmH- →Every word from Proto-Balto-Slavic timāˀ →Every word from Proto-Slavic tьma →