Quick Definition
ἀδυνατέω v. to be impossible
Strong's Definition
to be unable, i.e. (passively) impossible
Derivation: from G102 (ἀδύνατος);
KJV Usage: be impossible
UBS Dictionary of the Greek New Testament
verb | ἀ- + δύναμαι
71.3 · (ἀδυνατεῖ) · Mode · Possible, Impossible
impossible pertaining to being impossible, presumably because of a lack of power to alter or control circumstances In view of the double negation in LUK 1:37, it is often better to translate it as a positive statement, for example, ‘God can do anything.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἀδυνατέω, -@: fut. ἀδυνατήσω ; (ἀδύνατος); a. not to have strength, to be weak ; always so of persons in classic Grk. b. a thing ἀδυνατεῖ, cannot be done, is impossible; so only in the Sept. and N. T.: οὐκ ἀδυνατήσει mapa τῷ θεῷ [τοῦ θεοῦ L mrg. T Tr WH] πᾶν ῥῆμα, Lk. i. 37 (Sept. Gen. xviii. 14) [al. retain the act. sense here: from God no word shall be without power, see mapa, I. Ὁ. ef. Field, Otium Norv. pars iii. ad loc.]; οὐδὲν ἀδυνατήσει ὑμῖν, Mt. xvii. 20, (Job xlii. 2).
Mounce Concise Greek Dictionary
ἀδυνατέω adynateō 2x
not to be able; to be impossible, Mt. 17:20; Lk. 1:37*
Abbott-Smith Greek Lexicon
ἀδυνατέω, -ῶ
(< ἀδύνατος), [in LXX: De 17:8, Za 8:6 (פּלא ni.), Jb 42:2 (בּצר ni.), al.;]
to be unable (cl., Philo; π., v. MM, VGT, s.v.).
In LXX and NT (Kennedy, Sources, 124; Hatch, Essays, 4; Field, Notes, 46 f.), to be impossible: Mt 17:20, Lk 1:37.†
Moulton & Milligan — Vocabulary of the Greek NT
Liddell-Scott-Jones — Greek-English Lexicon
ἀδυνατέω (adunateō) — be impossible. ἀδῠνᾰτ-έω, of persons, to be ἀδύνατος, lack strength, [Refs 5th c.BC+]: with infinitive, to be unable to do, [Refs 5th c.BC+]
II. of things, to be impossible, [LXX+1st c.BC+]