Vocabulary of the day!!
Vendetta:
1- a private feud in which the members of the family of a murdered person seek to avenge the murder by killing the slayer or one of the slayer's relatives, especially such vengeance as once practiced in Corsica and parts of Italy.
2- any prolonged and bitter feud, rivalry, contention, or the like:
a political vendetta.
Origin: 1850–55; <Italian <Latin vindicta vengeance