ἀνταμύνεσθαι
From LSJ
Greek > English (Woodhouse Verbs Reversed)
(see also ἀνταμύνομαι): repay, persons, requite in return, requite with evil, requite, reward a person
Lexicon Thucydideum
vim sibi illatam propellere et ulcisci, to ward off force applied to them and take vengeance, 3.84.1, 4.19.2. 4.19.3.