G1573
ἐκκακέω
to lose heart
ἐκκακέω, -ῶ, see: ἐνκακέω. ἐν-κακέω, -ῶ (LTr., ἐγκ-; Rec. ἐκκ-; cf. WH, Notes, 157 f.; κακός, cowardly), [in Sm.: Gen.27:46, Num.21:5, Pro.3:11, Isa.7:16 *;] to lose heart : Luk.18:1, 2Co.4:1,16, Gal.6:9, Eph.3:13, 2Th.3:13 (Cremer, 330).† (AS)
The KJV translates G1573 in the following manner:
faint (8x), weary (4x), be (2x), us (2x)
Full Thayer's lexicon entry
ἐκκακέω — ekkakéō
ἐκκακέω, ἐκκάκω; (1 aorist ἐξεκάκησα); (κακός); to be utterly spiritless, to be wearied out, exhausted; see ἐγκακέω (cf. Winers Grammar, 25).
6 occurrences
Luke (1), II Corinthians (2), Galatians (1), Ephesians (1), II Thessalonians (1)