*SET-U

English word origin

Etymology of nasty

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

1 source sectionExtended source reportWiktionary original ↗
In this entry · 1 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Unnumbered source etymology

Original entry ↗
adj

Dirty, filthy. · Contemptible, unpleasant (of a person). · Objectionable, unpleasant (of a thing); repellent, offensive. · Indecent or offensive; obscene, lewd.

verb

To besmirch, to befoul.

noun

Something nasty. · Sexual intercourse. · A video nasty.

Selected source glosses provide context, not a complete modern definition inventory

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.

Relationships mentioned by the source

These are extracted mentions, not a timeline or a verified sequence of immediate parents.

  • Inherited-form mentionnastyenm
  • Cognate mentionnaskyen · nasty
  • Derivation mention*nasktyenm
  • Derivation mention*naskedenm · dirty, messy
  • Cognate mentionnasketda · dirty, foul, unpleasant
  • Cognate mentionnaskotsv · dirty, filthy
  • Cognate mentionnaskigsv
  • Derivation mention*hnaskuzgem-pro · tender, soft
  • Doublet mentionneshen
  • Doublet mentionnoshen
  • Cognate mentionnastiesco
  • Derivation mentionnasknds · nasty
  • Borrowed-form mentionnestichdum
  • Cognate mentionnestignl · dirty, filthy, unclean; lazy, cranky
  • Derivation mentionnastrefro · lowly, strange
  • Derivation mention-asterla
  • Derivation mentionnazgoh · wet

This page abbreviates 4 auxiliary source items. The etymology narrative is not shortened. Omission counts are available in the audit fields below; consult the original for complete auxiliary material.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

{
  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "nasty"
      },
      "expansion": "Middle English nasty"
    },
    {
      "name": "cog",
      "args": {
        "1": "en",
        "2": "nasky",
        "t": "nasty"
      },
      "expansion": "English nasky (“nasty”)"
    },
    {
      "name": "unc",
      "args": {
        "1": "en",
        "title": "obscure",
        "nocap": "1"
      },
      "expansion": "obscure"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "*naskty"
      },
      "expansion": "Middle English *naskty"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "*nasked",
        "t": "dirty, messy"
      },
      "expansion": "Middle English *nasked (“dirty, messy”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gmq",
        "3": "-"
      },
      "expansion": "North Germanic"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "nasket",
        "t": "dirty, foul, unpleasant"
      },
      "expansion": "Danish nasket (“dirty, foul, unpleasant”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "naskot",
        "t": "dirty, filthy"
      },
      "expansion": "Swedish naskot (“dirty, filthy”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "naskig"
      },
      "expansion": "Swedish naskig"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*hnaskuz",
        "t": "tender, soft"
      },
      "expansion": "Proto-Germanic *hnaskuz (“tender, soft”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "nesh",
        "3": "nosh",
        "nocap": "1"
      },
      "expansion": "doublet of nesh and nosh"
    },
    {
      "name": "cog",
      "args": {
        "1": "sco",
        "2": "nastie"
      },
      "expansion": "Scots nastie"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "nds",
        "3": "nask",
        "t": "nasty"
      },
      "expansion": "Low German nask (“nasty”)"
    },
    {
      "name": "suf",
      "args": {
        "1": "en",
        "2": "",
        "3": "y",
        "id2": "adjectival"
      },
      "expansion": "+ -y"
    },
    {
      "name": "bor",
      "args": {
        "1": "en",
        "2": "dum",
        "3": "nestich"
      },
      "expansion": "Middle Dutch nestich"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "nestig",
        "t": "dirty, filthy, unclean; lazy, cranky"
      },
      "expansion": "Dutch nestig (“dirty, filthy, unclean; lazy, cranky”)"
    },
    {
      "name": "gloss",
      "args": {
        "1": "\"nasty, dirty, unpleasant\" > Modern Dutch <i class=\"Latn mention\" lang=\"nl\">nestig</i> (“dirty, filthy, unclean; lazy, cranky”)"
      },
      "expansion": "(\"nasty, dirty, unpleasant\" > Modern Dutch nestig (“dirty, filthy, unclean; lazy, cranky”))"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "nastre",
        "t": "lowly, strange"
      },
      "expansion": "Old French nastre (“lowly, strange”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "-aster"
      },
      "expansion": "Latin -aster"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "goh",
        "3": "naz",
        "t": "wet"
      },
      "expansion": "Old High German naz (“wet”)"
    },
    {
      "name": "noncog",
      "args": {
        "1": "en",
        "2": "nesh",
        "3": "nesh(y)",
        "t": "soft"
      },
      "expansion": "English nesh(y) (“soft”)"
    },
    {
      "name": "noncog",
      "args": {
        "1": "en",
        "2": "naughty"
      },
      "expansion": "English naughty"
    }
  ],
  "links": [
    [
      "nasty",
      "nasty#Middle_English"
    ],
    [
      "nasti",
      "nasti#Middle_English"
    ],
    [
      "naxty",
      "naxty#Middle_English"
    ],
    [
      "naxte",
      "naxte#Middle_English"
    ],
    [
      "nasky",
      "nasky#English"
    ],
    [
      "*naskty",
      "Reconstruction:Middle English/naskty"
    ],
    [
      "*naskedy",
      "Reconstruction:Middle English/naskedy"
    ],
    [
      "*nasked",
      "Reconstruction:Middle English/nasked"
    ],
    [
      "-y",
      "-y#Middle_English"
    ],
    [
      "nasket",
      "nasket#Danish"
    ],
    [
      "naskot",
      "naskot#Swedish"
    ],
    [
      "naskig",
      "naskig#Swedish"
    ],
    [
      "naskug",
      "naskug#Swedish"
    ],
    [
      "*hnaskuz",
      "Reconstruction:Proto-Germanic/hnaskuz"
    ],
    [
      "nesh",
      "nesh#English"
    ],
    [
      "nosh",
      "nosh#English"
    ],
    [
      "nastie",
      "nastie#Scots"
    ],
    [
      "nestie",
      "nestie#Scots"
    ],
    [
      "nask",
      "nask#Low_German"
    ],
    [
      "-y",
      "-y#English:_adjectival"
    ],
    [
      "nestich",
      "nestich#Middle_Dutch"
    ],
    [
      "nistich",
      "nistich#Middle_Dutch"
    ],
    [
      "Dutch",
      "w:Dutch language"
    ],
    [
      "nestig",
      "nestig#Dutch"
    ],
    [
      "*nest",
      "Reconstruction:Proto-West Germanic/nest"
    ],
    [
      "nastre",
      "nastre#Old_French"
    ],
    [
      "villenastre",
      "villenastre#Old_French"
    ],
    [
      "vilein",
      "vilein#Old_French"
    ],
    [
      "-astre",
      "-astre#Old_French"
    ],
    [
      "pejorative",
      "pejorative"
    ],
    [
      "-aster",
      "-aster#Latin"
    ],
    [
      "naz",
      "naz#Old_High_German"
    ],
    [
      "nesh(y)",
      "nesh#English"
    ],
    [
      "naughty",
      "naughty#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "adj",
      "glosses": [
        "Dirty, filthy.",
        "Contemptible, unpleasant (of a person).",
        "Objectionable, unpleasant (of a thing); repellent, offensive.",
        "Indecent or offensive; obscene, lewd."
      ],
      "tags": [
        "US"
      ],
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      "sourceRecordOrdinal": 161005
    },
    {
      "pos": "verb",
      "glosses": [
        "To besmirch, to befoul."
      ],
      "tags": [
        "also",
        "figuratively",
        "reflexive",
        "transitive"
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    },
    {
      "pos": "noun",
      "glosses": [
        "Something nasty.",
        "Sexual intercourse.",
        "A video nasty."
      ],
      "tags": [
        "informal",
        "euphemistic",
        "slang"
      ],
      "recordId": "d9d212dfb5dffcd7f1665cc81e0550231d120a3fdae1c54b8f73a6739457ea13",
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  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 4,
    "glosses": 0
  }
}

Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for nasty →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger
Machine-source provenance
Source SHA-256
5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run
73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID
w-bmFzdHk