ἀγρυπνέω, -ῶ
(< ἄγρυπνος, seeking sleep; < ἀγρεύω, ὕπνος),
[in LXX chiefly for שׁקד;]
to be sleepless, wakeful (Theogn., Xen., al.); metaph. (LXX) = cl. ἐγρήγορα, to be watchful, vigilant: Mk 13:33, Lk 21:36, Eph 6:18, He 13:17.†
SYN.: γρηγορέω, q.v.; νήφω, associated with γ. in I Pe 5:8, expressing a wariness which results from self-control, a condition of moral, not merely mental alertness (v. M, Th., I, 5:6).