ефір

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ефір

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Borrowed from Ancient Greek αἰθήρ (aithḗr, “upper air”).

ефі́р • (efír) m inan (genitive ефі́ру, nominative plural ефі́ри, genitive plural ефі́рів, relational adjective ефі́рний)

ether (organic chemistry: a compound containing an oxygen atom bonded to two hydrocarbon groups)
(uncountable, literary or poetic) ether (The substance formerly supposed to fill the upper regions of the atmosphere; by extension the sky, the heavens; the void, nothingness).
(historical, physics) luminiferous aether, aether
(alchemy) ether
(broadcasting) air, ether
в ефі́рі ― v efíri ― on air

прями́й ефі́р ― prjamýj efír ― live broadcast (literally, “direct ether”)

Declension of ефі́р (inan hard masc-form accent-a)