From Longman Dictionary of Contemporary Englishrancourran‧cour British English, rancor American English /ˈræŋkə $ -ər/ noun [uncountable] formalHATE a feeling of hatred and anger towards someone you cannot forgive because they harmed you in the past → resentmentwithout rancour He spoke openly about the war without a trace of rancour.
Examples from the Corpus
rancour• You could hardly say they had been reconciled, but there seemed no rancour between them.• In such an atmosphere of rancour and distrust it was hardly surprising that the magazine never developed a proper editorial identity.• Gang leaders fled the scene, and all traces of rancour and suspicion vanished with them.• Often exasperating to colleagues, he was always courteous and never bore personal rancour.• This is ridiculously expensive, and the cause of much political rancour.• He observed with simmering rancour as she began to tell Malengin about her life in the poisoner's house in Scaraby.• But the mental process allows us to filter our response to avoid undue rancour. 