*SET-U

English word origin

Etymology of boast

From Middle English bosten, from bost (“boast, glory, noise, arrogance, presumption, pride, vanity”), probably of North Germanic origin, ultimately from Proto-Germanic *bausuz (“inflated, swollen, puffed up, proud, arrog

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.

Source etymology 1

Original entry ↗
verb

To brag; to talk loudly in praise of oneself. · [with about or of] To speak of with pride, vanity, or exultation, with a view to self-commendation; to extol. · To speak in exulting language of another; to glory; to exult. · To play a boast shot.

noun

A brag; ostentatious positive appraisal of oneself. · Something that one brags about. · A shot where the ball is driven off a side wall and then strikes the front wall.

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

From Middle English bosten, from bost (“boast, glory, noise, arrogance, presumption, pride, vanity”), probably of North Germanic origin, ultimately from Proto-Germanic *bausuz (“inflated, swollen, puffed up, proud, arrogant, bad”). Cognate with Scots bost, boist (“to threaten, brag, boast”), Anglo-Norman bost (“ostentation”) (from Germanic). Related to Norwegian baus (“proud, bold, daring”), dialectal German baustern (“to swell”), German böse (“evil, bad, angry”), Dutch boos (“evil, wicked, angry”), West Frisian boas (“bad, wicked, angry, shrewd, clever”). Compare also dialectal Norwegian bausta, busta (“to rush onward, make a noise”). Possible doublet of boost. Compare typologically puffy, Russian напы́щенный (napýščennyj), наду́тый (nadútyj).

Relationships mentioned by the source

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

This page abbreviates 1 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": "bosten"
      },
      "expansion": "Middle English bosten"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gmq"
      },
      "expansion": "North Germanic"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*bausuz",
        "4": "",
        "5": "inflated, swollen, puffed up, proud, arrogant, bad"
      },
      "expansion": "Proto-Germanic *bausuz (“inflated, swollen, puffed up, proud, arrogant, bad”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sco",
        "2": "bost"
      },
      "expansion": "Scots bost"
    },
    {
      "name": "cog",
      "args": {
        "1": "xno",
        "2": "bost",
        "3": "",
        "4": "ostentation"
      },
      "expansion": "Anglo-Norman bost (“ostentation”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "gem"
      },
      "expansion": "Germanic"
    },
    {
      "name": "cog",
      "args": {
        "1": "no",
        "2": "baus",
        "3": "",
        "4": "proud, bold, daring"
      },
      "expansion": "Norwegian baus (“proud, bold, daring”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "baustern",
        "3": "",
        "4": "to swell"
      },
      "expansion": "German baustern (“to swell”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "böse",
        "3": "",
        "4": "evil, bad, angry"
      },
      "expansion": "German böse (“evil, bad, angry”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "boos",
        "3": "",
        "4": "evil, wicked, angry"
      },
      "expansion": "Dutch boos (“evil, wicked, angry”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "boas",
        "3": "",
        "4": "bad, wicked, angry, shrewd, clever"
      },
      "expansion": "West Frisian boas (“bad, wicked, angry, shrewd, clever”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "no",
        "2": "-"
      },
      "expansion": "Norwegian"
    },
    {
      "name": "dbt",
      "args": {
        "1": "en",
        "2": "boost",
        "nocap": "1"
      },
      "expansion": "doublet of boost"
    },
    {
      "name": "m+",
      "args": {
        "1": "ru",
        "2": "напы́щенный"
      },
      "expansion": "Russian напы́щенный (napýščennyj)"
    }
  ],
  "links": [
    [
      "bosten",
      "bosten#Middle_English"
    ],
    [
      "bost",
      "bost#Middle_English"
    ],
    [
      "*bausuz",
      "Reconstruction:Proto-Germanic/bausuz"
    ],
    [
      "bost",
      "bost#Scots"
    ],
    [
      "boist",
      "boist#Scots"
    ],
    [
      "bost",
      "bost#Old_French"
    ],
    [
      "baus",
      "baus#Norwegian"
    ],
    [
      "baustern",
      "baustern#German"
    ],
    [
      "böse",
      "böse#German"
    ],
    [
      "boos",
      "boos#Dutch"
    ],
    [
      "boas",
      "boas#West_Frisian"
    ],
    [
      "bausta",
      "bausta#Norwegian_Bokmål"
    ],
    [
      "busta",
      "busta#Norwegian_Bokmål"
    ],
    [
      "boost",
      "boost#English"
    ],
    [
      "puffy",
      "puffy#English"
    ],
    [
      "напы́щенный",
      "напыщенный#Russian"
    ],
    [
      "наду́тый",
      "надутый#Russian"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To brag; to talk loudly in praise of oneself.",
        "[with about or of] To speak of with pride, vanity, or exultation, with a view to self-commendation; to extol.",
        "To speak in exulting language of another; to glory; to exult.",
        "To play a boast shot."
      ],
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      "pos": "noun",
      "glosses": [
        "A brag; ostentatious positive appraisal of oneself.",
        "Something that one brags about.",
        "A shot where the ball is driven off a side wall and then strikes the front wall."
      ],
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  "omittedAuxiliaryFields": {
    "templates": 0,
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    "lexicalRecords": 0,
    "lexicalSenses": 1,
    "glosses": 0
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}

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 boast →

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-Ym9hc3Q