The word for today is…
vendetta (noun) –
1 : blood feud
2 : an often prolonged series of retaliatory, vengeful, or hostile acts or exchange of such acts
Source : Merriam -Webster
Etymology : Vendetta has been getting even in English since the mid-19th century. English speakers borrowed vendetta, spelling and all, from Italian, in which it means “revenge.” It ultimately traces to the Latin verb vindicare, which means “to lay claim to” or “to avenge.” That Latin word is also in the family tree of many other English terms related to getting even, including avenge, revenge, vengeance, vindicate, and vindictive.
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