G3573
νυστάζω
to doze
νυστάζω (cf. νεύω), [in LXX for נוּם, etc ;] to nod in sleep, fall asleep: Mat.25:5. Metaphorical, of negligence or delay, ἡ ἀπώλεια αὐτῶν οὐ νυστάζει (cf. Psa.121:4, Isa.5:27) : 2Pe.2:3.† (AS)
The KJV translates G3573 in the following manner:
slumbered (2x), slumbereth (2x), they (2x)
Full Thayer's lexicon entry
νυστάζω — nystázō
νυστάζω; 1 aorist ἐνύσταξα; (ΝΥΩ, cf. νεύω, νευστάζω); the Sept. for נוּם;
1. properly, "to nod in sleep, to sleep (Hippocrates, Aristophanes, Xenophon, Plato, others); to be overcome or oppressed with sleep; to fall asleep, drop off to sleep," ((cf. Wycliffe) to nap it"): Mat 25:5; the Sept. for נִרְדַּם, Psa 75:7.
2. like the Latindormito (cf. our to be napping), tropical equivalent to: to be negligent, careless (Plato, Plutarch, others): of a thing equivalent to to linger, delay, 2Pe 2:3.
2 occurrences
Matthew (1), II Peter (1)