Lexicon :: Strong's G1573 - ekkakeō

ἐκκακέω, -ῶ; [1 aorist ἐξεκάκησα]; (κακός); to be utterly spiritless, to be wearied out, exhausted; see ἐγκακέω [cf. Winers Grammar, 25].

Related entry:

ἐγ-κακέω, ῶ [(see below); 1 aor. ἐνεκάκησα]; (κακός); [prop. to behave badly in; hence] to be weary in anything, or to lose courage, flag, faint: adopted by L T Tr WH in place of R G ἐκκακέω (which see) in Luke 18:1; 2 Corinthians 4:1, 16; Galatians 6:9; Ephesians 3:13; 2 Thessalonians 3:13 — except that T WH write ἐνκ. in Luke 18:1; Galatians 6:9; Ephesians 3:13; so WH in 2 Thessalonians 3:13, also see ἐν, III. 3; [cf. Tdf.’s note on 2 Corinthians 4:1; Meyer ibid., who thinks that ἐκκ. may have been a colloquial form. See the full exhibition of the usage of the manuscripts given by Dr. Gregory in his Proleg. to Tdf. ed. 8, p. 78.] (Found a few times in Symmachus [Genesis 27:46; Numbers 21:5; Isaiah 7:16; also Proverbs 3:11 Theod.]; Clem. Rom. 2 Cor. 2, 2; in secular writings only in Polybius 4, 19, 10 τὸ πέμπειν τὰς βονθείας ἐνεκάκησαν they culpably neglected to send aid, [add Philo de confus. lingg. § 13 (Mang. 1:412, 36) οὐκ ἐκκακούμενος ἐκνάμϕθην].)