Abbott-Smith Manual Greek Lexicon
ἀκαίρως (G171)
1 ** ἀκαίρως , adv. ( ἄκαιρος , unseasonable ), [in LXX: Si 35 (32):4 *;] out of season , unseasonably : opp. to εὐκαίρως (q.v.), II Ti 4:2 (cf. Cremer, 740; MM, VGT , s.v.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain