Matthew 24:48κακὸς
But suppose that servant is wicked and says in his heart, ‘My master will be away a long time.’
Mark 7:21κακοὶ
For from within the hearts of men come evil thoughts, sexual immorality, theft, murder, adultery,
Acts 16:28κακόν
But Paul called out in a loud voice, “Do not harm yourself! We are all here!”
Romans 1:30κακῶν
slanderers, God-haters, insolent, arrogant, and boastful. They invent new forms of evil; they disobey their parents.
1 Corinthians 10:6κακῶν
These things took place as examples to keep us from craving evil things as they did.
1 Peter 3:9κακὸν
Do not repay evil with evil or insult with insult, but with blessing, because to this you were called so that you may inherit a blessing.

Abbott-Smith

κακός, -ή, -όν
[in LXX chiefly for רַע ;]

1. in general, opposite to ἀγαθός, καλός, in various senses, bad, mean, base, worthless (cl.).

2. In ethical sense, base, evil, wicked: of persons, Mat.21:41 24:48, Php.3:2, Rev.2:2; διαλογισμοί, Mrk.7:21; ὁμιλίαι, 1Co.15:33; ἐπιθυμία (Pro.12:12), Col.3:5; ἔργον, Rom.13:3; neut., κακόν, τὸ κ., evil: Jhn.18:23, Act.23:9, Rom.7:21 14:20 16:19, 1Co.13:5, Heb.5:14, 1Pe.3:10-11, 3Jn.11; pl., Rom.1:30, 1Co.10:6, 1Ti.6:10, Jas.1:13; κ. (τὸ, τὰ κ.) ποιεῖν (πράσσειν), Mat.27:23, Mrk.15:14, Luk.23:22, Jhn.18:30, Rom.3:8 7:19 13:4, 2Co.13:7, 1Pe.3:12; κατεργάζεσθαι, Rom.2:9; of wrongs inflicted, Act.9:13, Rom.12:17, 21 13:10, 1Th.5:15, 2Ti.4:14, 1Pe.3:9.

3. pernicious, harmful, evil: Luk.16:25, Act.16:28 28:5, Tit.1:12, Jas.3:8, Rev.16:2 (Cremer, 325, 741).
†
SYN.: see: (ἄθεσμος)
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.