Quick Definition
I nod in sleep, am drowsy, slumber
Strong's Definition
to nod, i.e. (by implication) to fall asleep; figuratively, to delay
Derivation: from a presumed derivative of G3506 (νεύω);
KJV Usage: slumber
Thayer's Greek Lexicon
νυστάζω; 1 aorist ἐνύσταξα; (ΝΥΩ, cf. νεύω, νευστάζω); the Sept. for πεΜν;
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 πΔψΐγΗΜν, 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.
Mounce Concise Greek Dictionary
νυστάζω nystazō 2x
to nod; to nod in sleep; to sink into a sleep, Mat_25:5 ; to slumber in inactivity, 2Pe_2:3
Abbott-Smith Greek Lexicon
νυστάζω
( cf. νεύω ),
[in LXX for H5123 , etc;]
to nod in sleep, fall asleep: Mat_25:5 . Metaph ., of negligence or delay, ἡ ἀπώλεια αὐτῶν οὐ νυστάζει ( cf. Psa_121:4 , Isa_5:27 ) : 2Pe_2:3 .†
Liddell-Scott — Intermediate Greek Lexicon
νυστάζω "to nod in sleep, to nap, slumber", Xen. , Plat. "to be sleepy, napping", Lat. dormito, Ar. , Plat. "to hang the head", Anth.
STEPBible — Tyndale Abridged Greek Lexicon
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)