bitter, rankling resentment or ill will; hatred; malice.
Also, especially British, ran·cour.
Origin: 1175–1225; Middle English rancour < Middle French < Late Latin rancōr- (stem of rancor) rancidity, equivalent to Latin ranc(ēre) (see rancid) + -ōr--or1
Related forms
ran·cored; especially British, ran·coured, adjective
un·ran·cored, adjective
Synonyms bitterness, spite, venom, animosity. See malevolence.