Where does “эфирный” come from?

эфирный (Russian) comes from Russian эфи́р, from Ancient Greek Αἰθήρ, from Ancient Greek αἴθω, from Proto-Hellenic *áitʰō — to ignite.

эфирный (Russian): ethereal, aerial

Definitions

  1. ethereal, aerial

Ancestry of “эфирный”, step by step

StepLanguageWordMeaning
1Russianэфи́р—
2Ancient GreekΑἰθήρUpper Air
3Ancient GreekαἴθωTo ignite, kindle, light; To burn, blaze
4Proto-Hellenic*áitʰōto ignite
Every word from Proto-Hellenic *áitʰō →Every word from Ancient Greek αἴθω →Every word from Ancient Greek Αἰθήρ →