*SET-U

English word origin

Etymology of bra

Clipping of brassiere, borrowed from French brassière, from Old French braciere (originally a lining inside armor to protect the arm, but later a garment), from Old French brace (“arm”), from Latin bracchia, plural of La

3 source sectionsExtended source reportWiktionary original ↗
In this entry · 3 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 ↗
noun

An item of clothing, usually underwear worn to support the breasts.

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

Clipping of brassiere, borrowed from French brassière, from Old French braciere (originally a lining inside armor to protect the arm, but later a garment), from Old French brace (“arm”), from Latin bracchia, plural of Latin bracchium (“forearm”), from Ancient Greek βραχίων (brakhíōn, “forearm”), from Proto-Hellenic *brəkʰús (“short”) (because the forearm is shorter than the upper arm), inherited from Proto-Indo-European *mréǵʰus.

Relationships mentioned by the source

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

Inspect preserved source fields

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

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  "templates": [
    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*mreǵʰ-"
      },
      "expansion": ""
    },
    {
      "name": "clipping",
      "args": {
        "1": "en",
        "2": "brassiere"
      },
      "expansion": "Clipping of brassiere"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fr",
        "3": "brassière"
      },
      "expansion": "French brassière"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "braciere"
      },
      "expansion": "Old French braciere"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "brace",
        "4": "",
        "5": "arm"
      },
      "expansion": "Old French brace (“arm”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "bracchia"
      },
      "expansion": "Latin bracchia"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "bracchium",
        "4": "",
        "5": "forearm"
      },
      "expansion": "Latin bracchium (“forearm”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "grc",
        "3": "βραχίων",
        "4": "",
        "5": "forearm"
      },
      "expansion": "Ancient Greek βραχίων (brakhíōn, “forearm”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "grk-pro",
        "3": "*brəkʰús",
        "4": "",
        "5": "short"
      },
      "expansion": "Proto-Hellenic *brəkʰús (“short”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*mréǵʰus"
      },
      "expansion": "Proto-Indo-European *mréǵʰus"
    }
  ],
  "links": [
    [
      "brassiere",
      "brassiere#English"
    ],
    [
      "brassière",
      "brassière#French"
    ],
    [
      "braciere",
      "braciere#Old_French"
    ],
    [
      "brace",
      "brace#Old_French"
    ],
    [
      "bracchia",
      "bracchia#Latin"
    ],
    [
      "bracchium",
      "bracchium#Latin"
    ],
    [
      "βραχίων",
      "βραχίων#Ancient_Greek"
    ],
    [
      "*brəkʰús",
      "Reconstruction:Proto-Hellenic/brəkʰús"
    ],
    [
      "*mréǵʰus",
      "Reconstruction:Proto-Indo-European/mréǵʰus"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
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      "pos": "noun",
      "glosses": [
        "An item of clothing, usually underwear worn to support the breasts."
      ],
      "tags": [],
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}

Source etymology 2

Original entry ↗
noun

One of the two vectors in the standard notation for describing quantum states in quantum mechanics, the row vector; the other (column) vector being its complex conjugate, the ket.

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

From bracket, referring to the notation introduced in 1939 by Paul Dirac.

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "wp",
      "args": {
        "1": "+-ket notation"
      },
      "expansion": ""
    }
  ],
  "links": [
    [
      "bracket",
      "bracket#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "One of the two vectors in the standard notation for describing quantum states in quantum mechanics, the row vector; the other (column) vector being its complex conjugate, the ket."
      ],
      "tags": [],
      "recordId": "920dfedc9024cae2124cd2054f90f135ac29637872ae13ad71382bec887feba3",
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}

Source etymology 3

Original entry ↗
noun

Alternative form of bro; friend, mate

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

Representing a different pronunciation of bro (“brother”).

Inspect preserved source fields

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

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  "links": [
    [
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      "bro#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Alternative form of bro; friend, mate"
      ],
      "tags": [
        "alt-of",
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      ],
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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 bra →

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-YnJh