Abbott-Smith Manual Greek Lexicon
νήφω (G3525)
6 * νήφω , to be sober , abstain from wine ; metaph., of moral alertness, to be sober , calm , circumspect : I Th 5:6 8 , II Ti 4:5 (v. Ellic., in l.), I Pe 1:13 4:7 5:8 (cf. ἀνα- , ἐκ-νήφω , and v. MM, xvii).† SYN. : ἀγρυπνέω , γρηγορέω .
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain