G2550
κακοήθεια
malice
κακοήθεια (WH, -θία), -ας, ἡ (κακός, ἦθος), [in LXX: Est.8:13, 3Ma.3:22 3Mac 7:3 A, 4Ma.1:4 4Mac 3:4 * ;] malignity, malevolence: Rom.1:29 (Cremer, 329).† (AS)
The KJV translates G2550 in the following manner:
malignity (2x)
Full Thayer's lexicon entry
κακοήθεια — kakoḗtheia
κακοήθεια (κακοηθια WH; see Iota), κακοηθείας, ἡ (from κακοήθης, and this from κακός and ἦθος), bad character, depravity of heart and life, Xenophon, Plato, Isocrates, others; 4Ma 1:4, where cf. Grimm, p. 299; specifically used of malignant subtlety, malicious craftiness: Rom 1:29 (3Ma 3:22; Additions to Est 8:1; Est 8:12 [Esther 8:238:12f, Esther 8:32p]; Clement of Rome, 1 Cor. 35, 5 [ET]; Josephus, Antiquities 1, 1, 4; 16, 3, 1; (contra Apion 1, 24, 4); Polybius 5, 50, 5, etc.). On the other hand, Aristotle, rhet. 2, 13 (3, p. 81) defines it τό ἐπί τό χεῖρον ὑπολαμβάνειν πάντα (taking all things in the evil part, Genevan N. T. Cf. Trench, § xi.).
1 occurrence