vendetta

A feud between two families that arises from the injury or killing of the member of one family by a member of the other family, leading to long-lasting animosity and retaliatory acts of revenge.

A series of acts attacking or attempting to injure another.

A condition of private war in which the nearest of kin execute vengeance on the slayer of a relative; a blood-feud.

A blood feud; private revenge for the murder of a kinsman.

Any feud or contention that is bitter and prolonged; however, the deep enmity may be held by only one party to the dispute.