Lexical Definition

‎ἀδυνατέω‎ adynatéō (ad-oo-nat-eh'-o) be impossible G:V
from ‎ἀδύνατος‎

be impossible.

Usage: 6 forms in 13 verses
Form Translated As     In Verse(s)
ἀδυνατήσει will be impossible Matt.17.20Luke.1.37
αδυνατούσι powerless LXX.Job.4.4
αδυνατεί impossible LXX.2Chr.14.11
is impossible LXX.Job.10.13
is powerless LXX.Job.42.2
powerless LXX.Dan.4.9
αδυνατήσουσιν shall be powerless LXX.Isa.8.15
αδυνατήση should be powerless LXX.Deut.17.8
αδυνατήσει he shall be powerless LXX.Lev.25.35
impossible LXX.Gen.18.14
it be impossible LXX.Zech.8.6LXX.Zech.8.6

Abbott-Smith

ἀδυνατέω, -ῶ (< ἀδύνατος), [in LXX: De 17:8, Za 8:6 (פּלא ni.), Jb 42:2 (בּצר ni.), al.;]
1. to be unable (cl., Philo; π., v. MM, VGT, s.v.).
2. In LXX and NT (Kennedy, Sources, 124; Hatch, Essays, 4; Field, Notes, 46 f.), to be impossible: Mt 17:20, Lk 1:37.†

Abbott-Smith References

Book Refs
Deuteronomy 17:8
Job 42:2
Zechariah 8:6
Matthew 17:20
Luke 1:37

Liddell-Scott-Jones

ἀδυνατέω-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+]

LSJ Scripture Refs: LXX.Job.10.13Matt.17.20Luke.1.37