adj. 25B6; adjective
an ugly face : UNATTRACTIVE, ill-favoured, hideous, plain, unlovely, unprepossessing, unsightly, horrible, frightful, awful, ghastly, unpleasant, vile, revolting, repellent, repugnant; grotesque, monstrous, reptilian, misshapen, deformed, disfigured; N. Amer. homely; informal not much to look at; Brit. informal no oil painting.
things got pretty ugly : UNPLEASANT, nasty, disagreeable, alarming, tense, charged, serious, grave; dangerous, perilous, threatening, menacing, hostile, ominous, sinister.
an ugly rumour : HORRIBLE, despicable, reprehensible, nasty, appalling, objectionable, offensive, obnoxious, vile, dishonourable, rotten, vicious, spiteful.
beautiful, pleasant.