G2551
κακολογέω
to curse/revile
κακολογέω, -ῶ (κακολόγος, slanderous), [in LXX: Exo.21:16 22:28, 1Ki.3:13, Pro.20:20, Eze.22:7 (קָלַל pi., hi.), 2Ma.4:1 * ;] to speak ill of, revile, abuse: with accusative of person(s), Mat.15:4, Mrk.7:10" (LXX) Mrk.9:39; with accusative of thing(s), Act.19:9.† (AS)
The KJV translates G2551 in the following manner:
curseth (4x), evil (4x)
Full Thayer's lexicon entry
κακολογέω — kakologéō
κακολογέω, κακολόγω; 1 aorist infinitive κακολογῆσαί; (κακολόγος); equivalent to κακῶς λέγω (which the old grammarians prefer, see Lob. ad Phryn., p. 200);
1. to speak ill of, revile, abuse, one; to calumniate, traduce: τινα, Mar 9:39; τί, Act 19:9; (2Ma 4:1; Lysias, Plutarch, others).
2. Hellenistically, to imprecate evil on, curse: τινα, Mat 15:4; Mar 7:10 (so for קִלֵּל, Pro 20:20; Eze 22:7; Exo 22:28).
4 occurrences
Matthew (1), Mark (2), Acts (1)