Vendetta

google

ref

mid 19th century: from Italian, from Latin vindicta ‘vengeance’.

wiktionary

ref

Borrowed from Italian vendetta(“revenge”), from Latin vindicta. See vindicate, avenge.

etymonline

ref

vendetta (n.)

"a private war in which a kinsman wreaks vengeance on the slayer of a relative," 1846, from Italian vendetta "a feud, blood feud," from Latin vindicta "vengeance, revenge" (see vindication). Especially associated with Corsica.