rancor
RANG-kernounMeaning bitter resentment that lasts a long time
Memory hook r-ANCHOR: a grudge you drag for years. Thirty years after losing the pie contest, Victor still drags his grudge around like a heavy anchor. Bitter resentment that lasts that long is rancor.
Years after the contest, he still spoke of the judges with rancor, a bitterness that never faded.
In context Though the two neighbors had settled the fence dispute in court long ago, the rancor between them lingered, and they still refused to wave to each other.
Similar bitterness, resentment, ill will, spite
Opposite goodwill, friendliness, forgiveness
From Latin rancor, “rankness, a grudge,” related to rancidus (stinking), the source of rancid.