Quick Definition
ἐνισχύω v. I invigorate, strengthen
Strong's Definition
from 1722 and 2480; to invigorate (transitively or reflexively)
KJV Usage: strengthen
UBS Dictionary of the Greek New Testament
verb | ἰσχύω
79.66 · Features of Objects · Strong, Weak
to strengthen again, to cause strength to return to cause someone to regain strength after a temporary loss
79.65 · Features of Objects · Strong, Weak
to regain strength to regain one’s physical strength after a temporary loss of it It may, however, be impossible to say in some languages ‘his strength came back,’ because this would seem to imply a kind of personification of ‘strength.’ Therefore, it may be necessary to translate this phrase in ACT 9:19 as ‘after he had eaten, he became strong again’ or ‘... he was no longer weak.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἐν-ισχύω; 1 aor. evicyvoa; [cf. B. 145 (127)]; Li intrans. fo grow strong, to receive strength: Acts ix. 19 [here WH Tr mrg. ἐνισχύθη]; (Aristot., Theophr., Diod., Sept.). 2. trans. /o make strong, to strengthen, (2 ὃ. xxii. 40; Sir. 1.4; Hippoer. leg. p. 2, 26 ὁ χρόνος ταῦτα πάντα ἐνισχύει) ; to strengthen one in soul, to inspirit: Lk. xxii. 43 [L br. WH reject the pass. ].
Mounce Concise Greek Dictionary
ἐνισχύω enischuō 2x
to strengthen, impart strength and vigor, Lk. 22:43; intrans. to gain, acquire, or recover strength and vigor, be strengthened, Acts 9:19*
Abbott-Smith Greek Lexicon
ἐν-ισχύω
[in LXX for חָזַק, etc. ;]
to strengthen: in spiritual sense, Lk 22[43]; pass., Ac 9:19 (Rec. ἐνισχύσεν, became strong, as in LXX, Ge 12:10 48:2, al.).†
Moulton & Milligan — Vocabulary of the Greek NT
ἐνισχύω. For the transitive use of this verb, as in Lk (Ac 9!9: οἴ, Lk 224% D) cf. Hippocrates Zex. p. 2, 26 ὁ δὲ χρόνος ταῦτα ἐνισχύσει πάντα, ὡς τραφῆναι τελέως (see Hobart, p. Sof.). In Theophr. Fragm. i. 65 τοῦτ᾽ ἐνισχύειν ἑκάστῳ, ‘this, in each thing, is strong,” we have the usual intrans. sense: see Abbott Fourfold Gospel, p. 177 πϑ.
Liddell-Scott-Jones — Greek-English Lexicon
ἐνισχύω (enischuō) — to strengthen. ἐνισχύω, strengthen, confirm, ὁ χρόνος ταῦτα -ύσει πάντα [NT+5th c.BC+]:—passive, [Refs 4th c.AD+]
II. intransitive, prevail in or among, ἐν ταῖς πόλεσι ἐνισχύει τὰ νόμιμα [Refs 4th c.BC+]; ἐνίσχυσεν ὡς.. the opinion prevailed that.., [Refs]