ἀντιδρᾶν κακῶς
From LSJ
δήλωσιν ποιούμενος ὅτι ὁ ἐντυγχάνων τοῖς τε λίθοις καὶ τοξεύμασι διεφθείρετο → intimating that it was a mere matter of chance who was hit and killed by stones and bow-shots
Greek > English (Woodhouse)
injure in return, repay with evil, requite a person with evil, retaliate upon, return evil for evil