G0160
αἰφνίδιος
sudden
αἰφνίδιος (in Lk, l.with, ἐφν- WH; see M, Pr., 35), -ον (αἴφνης = ἄφνως, suddenly), [in LXX: Wis.17:15, 2Ma.14:17, 3Ma.3:24 * ;] sudden, unexpected: Luk.21:34, 1Th.5:3.† (AS)
Full Thayer's lexicon entry
αἰφνίδιος — aiphnídios
αἰφνίδιος, (αἰφνης, ἀφανής, ἄφνω, which see), unexpected, sudden, unforeseen: Luk 21:34 (here WH ἐφνιδ., see their Introductory § 404 and Appendix, p. 151); 1Th 5:8. (Wis 17:14; 2Ma 14:17; 3Ma 3:24; Aeschylus, Thucydides 2, 61 τό αἰφνίδιον καί ἀπροσδόκητον, Polybius, Josephus, Plutarch, Dionysius Halicarnassus, others.)
STRONGS NT 160: ἐφνιδιος [ἐφνιδιος, see αἰφνίδιος.]
2 occurrences
Luke (1), I Thessalonians (1)