Bitter Bit•ter angry, hurt, or resentful because of one's bad experiences or a sense of unjust treatment. "I don't feel jealous or bitter" synonyms: resentful, embittered, aggrieved, begrudging, rancorous, spiteful, jaundiced, ill-disposed, sullen, sour, churlish, morose, petulant, peevish, with a chip on one's shoulder "a bitter woman"