Dictionary entry

εὔκαιρος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

εὔ-καιρος, -ον

[in LXX: Ps 103 (104):27 (עֵת), II Mac 14:29 15:20, 21, III Mac 4:11 5:44 *;]

timely, seasonable, suitable (Cremer, 740): ἡμέρα, Mk 6:21 (or empty, as in Byz. and MGr.; v. MM, Exp., xiv); βοήθεια, He 4:16.†