Where does “эфи́р” come from?

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

Ancestry of “эфи́р”, step by step

StepLanguageWordMeaning
1Ancient GreekΑἰθήρUpper Air
2Ancient GreekαἴθωTo ignite, kindle, light; To burn, blaze
3Proto-Hellenic*áitʰōto ignite

Words derived from “эфи́р”

Every word from Proto-Hellenic *áitʰō →Every word from Ancient Greek αἴθω →Every word from Ancient Greek Αἰθήρ →