Answer: feuded

AnswerCrossword Clue
FEUDED

Didn't bury the hatchet, say

FEUDED

Fought for decades

FEUDED

Kept up the quarrel

FEUDED
Had a long-running argument
FEUDED
Fought for generations
FEUDEDQuarreled at length
FEUDEDQuarreled bitterly
FEUDEDFought like the Hatfields and McCoys
FEUDEDQuarreled