*SET-U

English word origin

Etymology of frost

Etymology tree Proto-Indo-European *prews- Proto-Indo-European *-tós Proto-Indo-European *prustós Proto-Germanic *frustaz Proto-West Germanic *frost Old English frost Middle English frost English frost From Middle Englis

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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 ↗
verb

To cover with frost. · To become covered with frost. · To coat (something, e.g. a cake) with icing to resemble frost. · To anger or annoy.

noun

A cover of minute ice crystals on objects that are exposed to the air. Frost is formed by the same process as dew, except that the temperature of the frosted object is below freezing. · The cold weather that causes these ice crystals to form. · Coldness or insensibility; severity or rigidity of character. · The act of freezing; the congelation of water or other liquid.

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

Etymology tree Proto-Indo-European *prews- Proto-Indo-European *-tós Proto-Indo-European *prustós Proto-Germanic *frustaz Proto-West Germanic *frost Old English frost Middle English frost English frost From Middle English frost, from an unmetathesized variant of Old English forst (“frost”), from Proto-Germanic *frustaz (“frost”), from Proto-Indo-European *prews- (“to freeze; frost”). Cognate with Saterland Frisian Froast, Fröäst (“frost”), West Frisian froast (“frost”), Cimbrian bròst, vrost, vròst (“frost”), Dutch vorst (“frost”), German Frost (“frost”), Luxembourgish Frascht (“frost”), Vilamovian fröst (“frost”), Danish, Faroese, Icelandic, Norwegian Bokmål, Norwegian Nynorsk, Swedish frost (“frost”), Latin pruīna (“hoarfrost, frost, rime, snow”). Related to freeze.

Relationships mentioned by the source

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

This page abbreviates 5 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": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:frost",
        "tree": "+"
      },
      "expansion": "Etymology tree\nProto-Indo-European *prews-\nProto-Indo-European *-tós\nProto-Indo-European *prustós\nProto-Germanic *frustaz\nProto-West Germanic *frost\nOld English frost\nMiddle English frost\nEnglish frost\n[Appendix:Glossary#inherited|Inherited]] from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Germanic\", \"term\" : \"*frustaz\", \"status\" : \"ok\", \"lang\" : \"gem-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-West Germanic\", \"term\" : \"*frost\", \"status\" : \"inline\", \"lang\" : \"gmw-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old English\", \"term\" : \"forst\", \"status\" : \"ok\", \"lang\" : \"ang\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"frost\", \"status\" : \"ok\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"English\", \"term\" : \"frost\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"frost\">"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "frost"
      },
      "expansion": "Middle English frost"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "forst",
        "4": "",
        "5": "frost"
      },
      "expansion": "Old English forst (“frost”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*frustaz",
        "4": "",
        "5": "frost"
      },
      "expansion": "Proto-Germanic *frustaz (“frost”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*prews-",
        "t": "to freeze; frost"
      },
      "expansion": "Proto-Indo-European *prews- (“to freeze; frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "stq",
        "2": "Froast"
      },
      "expansion": "Saterland Frisian Froast"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "froast",
        "3": "",
        "4": "frost"
      },
      "expansion": "West Frisian froast (“frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "cim",
        "2": "bròst"
      },
      "expansion": "Cimbrian bròst"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "vorst",
        "3": "",
        "4": "frost"
      },
      "expansion": "Dutch vorst (“frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Frost",
        "3": "",
        "4": "frost"
      },
      "expansion": "German Frost (“frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "lb",
        "2": "Frascht",
        "3": "",
        "4": "frost"
      },
      "expansion": "Luxembourgish Frascht (“frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "wym",
        "2": "fröst",
        "3": "",
        "4": "frost"
      },
      "expansion": "Vilamovian fröst (“frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "-"
      },
      "expansion": "Danish"
    },
    {
      "name": "cog",
      "args": {
        "1": "fo",
        "2": "-"
      },
      "expansion": "Faroese"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "-"
      },
      "expansion": "Icelandic"
    },
    {
      "name": "cog",
      "args": {
        "1": "nb",
        "2": "-"
      },
      "expansion": "Norwegian Bokmål"
    },
    {
      "name": "cog",
      "args": {
        "1": "nn",
        "2": "-"
      },
      "expansion": "Norwegian Nynorsk"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "frost",
        "3": "",
        "4": "frost"
      },
      "expansion": "Swedish frost (“frost”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "pruīna",
        "3": "",
        "4": "hoarfrost, frost, rime, snow"
      },
      "expansion": "Latin pruīna (“hoarfrost, frost, rime, snow”)"
    },
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        "1": "en",
        "2": ":inh",
        "3": "enm:frost",
        "tree": "+"
      },
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    }
  ],
  "links": [
    [
      "*prews-",
      "Reconstruction:Proto-Indo-European/prews-"
    ],
    [
      "*-tós",
      "Reconstruction:Proto-Indo-European/-tós"
    ],
    [
      "*frustaz",
      "Reconstruction:Proto-Germanic/frustaz"
    ],
    [
      "*frost",
      "Reconstruction:Proto-West Germanic/frost"
    ],
    [
      "frost",
      "forst#Old_English"
    ],
    [
      "frost",
      "frost#Middle_English"
    ],
    [
      "frost",
      "frost#Middle_English"
    ],
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      "forst",
      "forst#Old_English"
    ],
    [
      "*frustaz",
      "Reconstruction:Proto-Germanic/frustaz"
    ],
    [
      "*prews-",
      "Reconstruction:Proto-Indo-European/prews-"
    ],
    [
      "Froast",
      "Froast#Saterland_Frisian"
    ],
    [
      "Fröäst",
      "Fröäst#Saterland_Frisian"
    ],
    [
      "froast",
      "froast#West_Frisian"
    ],
    [
      "bròst",
      "bròst#Cimbrian"
    ],
    [
      "vrost",
      "vrost#Cimbrian"
    ],
    [
      "vròst",
      "vròst#Cimbrian"
    ],
    [
      "vorst",
      "vorst#Dutch"
    ],
    [
      "Frost",
      "Frost#German"
    ],
    [
      "Frascht",
      "Frascht#Luxembourgish"
    ],
    [
      "fröst",
      "fröst#Vilamovian"
    ],
    [
      "frost",
      "frost#Swedish"
    ],
    [
      "pruīna",
      "pruina#Latin"
    ],
    [
      "freeze",
      "freeze#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To cover with frost.",
        "To become covered with frost.",
        "To coat (something, e.g. a cake) with icing to resemble frost.",
        "To anger or annoy."
      ],
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      "pos": "noun",
      "glosses": [
        "A cover of minute ice crystals on objects that are exposed to the air. Frost is formed by the same process as dew, except that the temperature of the frosted object is below freezing.",
        "The cold weather that causes these ice crystals to form.",
        "Coldness or insensibility; severity or rigidity of character.",
        "The act of freezing; the congelation of water or other liquid."
      ],
      "tags": [
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  "omittedAuxiliaryFields": {
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    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 5,
    "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 frost →

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-ZnJvc3Q