ἐθέλεχθρος
From LSJ
τοῖς οἰκείοις συκοφαντίαν δέδωκεν → has given to his friends an opportunity for chicane, has offered to his friends the right of vindictive prosecution
English (LSJ)
ον,
A bearing one a grudge, Cratin.407, Ph.2.269. Adv. -ρως, ἔχειν πρός τινα D.39.36, cf.Ph.2.120, Paus.4.4.4.