• synonyms


adjective, nas·ti·er, nas·ti·est.
  1. physically filthy; disgustingly unclean: a nasty pigsty of a room.
  2. offensive to taste or smell; nauseating.
  3. offensive; objectionable: a nasty habit.
  4. vicious, spiteful, or ugly: a nasty dog; a nasty rumor.
  5. bad or hard to deal with, encounter, undergo, etc.; dangerous; serious: a nasty cut; a nasty accident.
  6. very unpleasant or disagreeable: nasty weather.
  7. morally filthy; obscene; indecent: a nasty word.
  8. Slang. formidable: The young pitcher has a good fast ball and a nasty curve.
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noun, plural nas·ties.
  1. Informal. a nasty person or thing.
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Origin of nasty

1350–1400; Middle English < ?
Related formsnas·ti·ly, adverbnas·ti·ness, noun

Synonyms for nasty

Antonyms for nasty

1. clean, pure.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for nastiest

tough, murderous, vile, noxious, vulgar, ornery, outrageous, awful, unpleasant, icky, dirty, horrible, fierce, rough, obnoxious, ribald, unseemly, wicked, distasteful, unkind

Examples from the Web for nastiest

Contemporary Examples of nastiest

Historical Examples of nastiest

British Dictionary definitions for nastiest


adjective -tier or -tiest
  1. unpleasant, offensive, or repugnant
  2. (of an experience, condition, etc) unpleasant, dangerous, or painfula nasty wound
  3. spiteful, abusive, or ill-natured
  4. obscene or indecent
  5. nasty piece of work British informal a cruel or mean person
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noun plural -ties
  1. an offensive or unpleasant person or thinga video nasty
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Derived Formsnastily, adverbnastiness, noun

Word Origin for nasty

C14: origin obscure; probably related to Swedish dialect nasket and Dutch nestig dirty
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for nastiest



c.1400, "foul, filthy, dirty, unclean," of unknown origin; perhaps [Barnhart] from Old French nastre "miserly, envious, malicious, spiteful," shortened form of villenastre "infamous, bad," from vilein "villain" + -astre, pejorative suffix, from Latin -aster.

Alternative etymology [OED] is from Dutch nestig "dirty," literally "like a bird's nest." Likely reinforced in either case by a Scandinavian source (cf. Swedish dialectal naskug "dirty, nasty"), which also might be the source of the Middle English word. Of weather, from 1630s; of things generally, "unpleasant, offensive," from 1705. Of people, "ill-tempered," from 1825. Noun meaning "something nasty" is from 1935. Related: Nastily; nastiness.

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Online Etymology Dictionary, © 2010 Douglas Harper