ἐφυβρίζειν

From LSJ

τὸ δὲ ποιεῖν ἄνευ νοῦ ἃ δοκεῖ καὶ σὺ ὁμολογεῖς κακὸν εἶναι: ἢ οὔ → but doing what one thinks fit without intelligence is—as you yourself admit, do you not?—an evil

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἐφυβρίζω): insult

Lexicon Thucydideum

contumeliosas voces iacere, to utter insulting words, 6.63.3.