noun
vendetta
ven-DET-uh/venˈdetə/
A prolonged bitter feud or campaign of revenge.
The neighbors' vendetta continues across the repeatedly damaged and repaired fence.

Etymology
The root means revenge, and a vendetta originally named a family blood-feud in which relatives avenged a killing. That pattern of retaliation supplies the image for a prolonged bitter campaign against someone.
In context
Half the confusion and fever of the world comes of this vendetta he declares against the hapless innocents who have once done him a wrong.
More examples
- The two families have carried on a vendetta for generations.
- She accuses the newspaper of pursuing a personal vendetta against her.
- Old vendettas keep the neighbors from settling even minor disputes.
Forms
vendetta · vendettas