very unattractive or unpleasant to look at; offensive to the sense of beauty; displeasing in appearance.

disagreeable; unpleasant; objectionable

ugly tricks; ugly discords.

morally revolting

ugly crime.

threatening trouble or danger

ugly symptoms.

mean; hostile; quarrelsome

an ugly mood; an ugly frame of mind.

(esp. of natural phenomena) unpleasant or dangerous

ugly weather; an ugly sea.

adjective

attractive , beautiful , lovely , pleasing , agreeable , good , kind , nice , pleasant , delicate , gentle , safe

adjective

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 , base , despicable , dirty , disgusting , distasteful , filthy , ignoble , low , low-down , mean , messy , nasty , nauseous , noisome , objectionable , odious , offensive , pesky , repellent , scandalous , servile , shocking , sickening , sordid , sorry , terrible , troublesome , troublous , vexatious , vile , wicked , wretched , angry , bellicose , black , cantankerous , crabbed , crabby , dark , disagreeable , dour , evil , fell , forbidding , formidable , gloomy , glum , grave , grievous , major , malevolent , menacing , morose , obnoxious , ominous , pugnacious , quarrelsome , rough , saturnine , scowling , serious , sinister , spiteful , sullen , surly , treacherous , truculent , vicious , violent , atrocious , nauseating , unwholesome , heavy , raging , roiled , roily , rugged , stormy , tempestuous , tumultuous , turbulent , wild , bad-tempered , cranky , cross , fretful , grouchy , grumpy , irascible , irritable , peevish , petulant , querulous , snappish , snappy , testy , waspish , (colloq.) crossgrained , bad , dangerous , dowdy , grewsome , gruesome , hard-visaged , horrible , ill-natured , inaffable , indocile , mutilated , refractory , threatening , toady , unamiable , unappealing , unattractive , unbeauteous , unesthetic , unpleasant

noun

monstrosity , ugliness