Meaning

noun a feeling of deep and bitter anger and ill-will

originEtymology tree Latin ranceō Proto-Indo-European *-os Proto-Indo-European *-s Proto-Indo-European *-ōs Proto-Italic *-ōs Latin -or Latin rancor Old French rancorbor. Middle English rancour English rancor First attested in the 13th century as Middle English rancour, from Old French rancor, from Latin rancor (“rancidity, grudge, rancor”), from ranceō (“to be rotten or putrid”), from which also…

Etymology from Wiktionary, CC BY-SA 3.0