Of habitual bad temper; having an unpleasant disposition; surly; disagreeable; cross; peevish; fractious; crabbed; of people; as, an ill-natured person; an ill-natured disagreeable old man. Opposite of good-natured. (Narrower terms: argumentative, contentious, disputatious, disputative, litigious: atrabilious, bilious, dyspeptic, liverish: bristly, prickly, snappish, splenetic, waspish: cantankerous, crotchety, ornery: choleric, irascible, hotheaded, hot-headed, hot-tempered, quick-tempered, short-tempered: crabbed, crabby, cross, fussy, fussbudgety, grouchy, grumpy, bad-tempered, ill-tempered: cranky, fractious, irritable, peevish, peckish, pettish, petulant, testy, tetchy, techy: crusty, curmudgeonly, gruff, ill-humored, ill-humoured: dour, glowering, glum, moody, morose, saturnine, sour, sullen: feisty, touchy: huffish, sulky: misanthropic, misanthropical: misogynous: shirty, snorty ill-tempered or annoyed): shrewish, nagging, vixenish: surly, ugly) Also See: unpleasant.