English Reference
adjective · noun

nasty

adj. · n.
US /ˈnæsti/ UK /nˈɑːsti/ nasty UK spelling nasties

  1. 01 B1 Intermediate

    adj.very unpleasant to see, smell, or taste.

    adj.physically repellent or highly offensive to the senses.

    Simple

    There was a nasty smell coming from the old fridge in the garage.

    In context

    The hikers were forced to turn back after encountering a nasty stench emanating from the stagnant pools near the trail.

  2. 02 B1 Intermediate

    adj.behaving in an unkind, spiteful, or rude way towards others.

    adj.behaving with malice or spite; intentionally unkind in interpersonal interactions.

    Simple

    Don't be so nasty to your brother; he was only trying to help.

    In context

    The critic was known for his nasty reviews, often attacking the actors' personal lives rather than their performances.

  3. 03 B2 Upper Intermediate

    adj.dangerous, painful, or serious, especially regarding an injury or weather.

    adj.serious, severe, or dangerous in nature; frequently used to describe injuries, illnesses, or weather conditions.

    Simple

    He had a nasty fall on the ice and had to go to the hospital.

    In context

    The pilot decided to divert the flight to avoid a nasty storm front developing over the channel.

  4. 04 B2 Upper Intermediate British English

    adj.difficult to deal with or solve.

    adj.characterised by complexity or hidden dangers; difficult to navigate or resolve.

    Simple

    That was a nasty question in the exam that caught everyone by surprise.

    In context

    The road has a nasty bend just after the bridge where many drivers lose control in the rain.

  5. 05 C1 Advanced American EnglishSlang

    adj.very good or impressive in a powerful way.

    adj.formidable, highly skilled, or impressive; often used to describe a powerful technique or performance.

    Simple

    The pitcher has a nasty curveball that is almost impossible to hit.

    In context

    The lead guitarist delivered a nasty solo that left the audience stunned by his technical proficiency.

  6. 06 C2 Proficiency Informal

    n.an unpleasant person or thing.

    n.an informal reference to a person or thing perceived as unpleasant or harmful.

    Simple

    The horror movie was full of monsters and other nasties.

    In context

    The software update was designed to protect the operating system from various internet nasties like malware and spyware.

In addition, a nasty stye has turned his left eye a gluey purple.

The Guardian· 21 Aug 2026

The drink was as nasty as it looked.

The Conversation· 21 Aug 2026

From Middle English nasty, nasti, naxty, naxte (“unclean, filthy”), whence also Early Modern English nasky (“nasty”), of obscure origin. Probably from earlier Middle English naskty, naskedy, from Middle English nasked (“dirty, messy”) + -y, ultimately of North Germanic origin (comparable to Danish nasket (“dirty, foul, unpleasant”), Swedish naskot (“dirty, filthy”), Swedish naskig, naskug (“nasty, dirty, messy”)), themselves all probably related to Proto-Germanic hnaskuz (“tender, soft”). Likely doublet of nesh and nosh. Cognate with Scots nastie, nestie (“dirty, filthy”). Alternative theories have also been proposed, which include: * From Low German nask (“nasty”) + -y. Middle Dutch nestich, nistich ("nasty, dirty, unpleasant" > Modern Dutch nestig (“dirty, filthy, unclean; lazy, cranky”)), perhaps ultimately connected to the Scandinavian word above, or related to nest (“nest”). * From Old French nastre (“lowly, strange”), shortened form of villenastre (“infamous, bad”), from vilein (“villain”) + -astre (pejorative suffix), from Latin -aster. * Other suggestions include Old High German naz (“wet”), hardening of English nesh(y) (“soft”), or alteration of English naughty. * Modern use of the word is sometimes attributed to the popular and often derogatory 19th century American political cartoons of Thomas Nast, but the word predates him.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin goh naz
Level B2 · Upper Intermediate
Frequency Common
Updated