Dictionary entry

νυστάζω

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

νυστάζω

(cf. νεύω), [in LXX for נוּם, etc;]

to nod in sleep, fall asleep: Mt 25:5. Metaph., of negligence or delay, ἡ ἀπώλεια αὐτῶν οὐ νυστάζει (cf. Ps 120 (121):4, Is 5:27): II Pe 2:3.†