ἈΉΡ

ἈΉΡ: ἀήρ, ἀέρος, ὁ, [ [in LXX: II Ki 22:12 (= Ps 17 (18):11 שׁחק), Wi8;] ] in Hom., Hes., the lower air which surrounds the earth, as opp. to the purer αἰθήρ of the higher regions; generally, air (MM, VGT, s.v.): Ac 22:23, I Th 4:17, Re 9:2 16:17; of the air as the realm of demons, Eph 2:2; ἀ. δέρειν, of striving to no purpose, I Co 9:26; εἰς ἀ. λαλεῖν, of speaking without effect, not being understood, I Co 14:9.†