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adjective
unattractive
Synonyms: animal, appalling, awful, bad-looking, beastly, deformed, disfigured, foul, frightful, grisly, gross, grotesque, hard-featured, hideous, homely, horrid, ill-favored, loathsome, misshapen, monstrous, not much to look at, plain, repelling, repugnant, repulsive, revolting, unbeautiful, uncomely, uninviting, unlovely, unprepossessing, unseemly, unsightly
Antonyms: attractive, beautiful, lovely, pleasing
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adjective
unpleasant, disagreeable
Synonyms: base, despicable, dirty, disgusting, distasteful, filthy, foul, frightful, hideous, horrid, ignoble, low, low-down, mean, messy, monstrous, nasty, nauseous, noisome, objectionable, odious, offensive, pesky, repellent, repugnant, repulsive, revolting, scandalous, servile, shocking, sickening, sordid, sorry, terrible, troublesome, troublous, vexatious, vile, wicked, wretched
Antonyms: agreeable, good, kind, nice, pleasant, pleasing
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adjective
dangerous, threatening
Synonyms: angry, bellicose, black, cantankerous, crabbed, crabby, dark, disagreeable, dour, evil, fell, forbidding, formidable, gloomy, glum, grave, grievous, major, malevolent, menacing, morose, nasty, obnoxious, ominous, pugnacious, quarrelsome, rough, saturnine, scowling, serious, sinister, spiteful, sullen, surly, treacherous, truculent, vicious, violent, wicked
Antonyms: delicate, gentle, safe