*SET-U

English word origin

Etymology of moult

Etymology tree Proto-Indo-European *mey-? Proto-Indo-European *meyth₂-der. Latin mūtōder. Old English *mutian Middle English mouten English moult From Middle English mouten, from Old English *mutian (attested in bemutian

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 ↗
verb

To undergo the process of shedding or losing a covering of hair or fur, feathers, skin, horns, etc, and replacing it with a fresh one; to change by moulting. · To shed in such a manner.

noun

The process of shedding or losing a covering of fur, feathers or skin etc. · The skin or feathers cast off during the process of moulting.

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

Etymology tree Proto-Indo-European *mey-? Proto-Indo-European *meyth₂-der. Latin mūtōder. Old English *mutian Middle English mouten English moult From Middle English mouten, from Old English *mutian (attested in bemutian, “to exchange for”), from Latin mūtō (“to (re)move, change, vary, mutate, exchange, abandon”). Doublet of mute and mutate. The unetymological ⟨l⟩ was introduced into the spelling by mistakenly assuming a French origin with -l- as in fault and vault; compare solder, which in contrast has an etymological ⟨l⟩ (from Latin solidāre, “to make solid“) but was historically pronounced without that grapheme's sound.

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.

{
  "templates": [
    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*mey- (change)"
      },
      "expansion": ""
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:mouten<ety:inh<ang:*mutian<ety:der<la:mūtō<id:move>>>>>",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *mey-?\nProto-Indo-European *meyth₂-der.\nLatin mūtōder.\nOld English *mutian\nMiddle English mouten\nEnglish moult\n[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"id\" : \"move\", \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"gloss\" : \"to exchange\", \"children\" : [ { \"terms\" : [ { \"is_uncertain\" : true, \"id\" : \"change\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*mey-\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*meyth₂-\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"mūtō\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Old English\", \"term\" : \"*mutian\", \"status\" : \"inline\", \"lang\" : \"ang\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"mouten\", \"status\" : \"inline\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"English\", \"term\" : \"moult\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"moult\">"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "mouten"
      },
      "expansion": "Middle English mouten"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "*mutian"
      },
      "expansion": "Old English *mutian"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "mūtō",
        "4": "",
        "5": "to (re)move, change, vary, mutate, exchange, abandon"
      },
      "expansion": "Latin mūtō (“to (re)move, change, vary, mutate, exchange, abandon”)"
    },
    {
      "name": "dbt",
      "args": {
        "1": "en",
        "2": "mute",
        "3": "mutate"
      },
      "expansion": "Doublet of mute and mutate"
    },
    {
      "name": "m+",
      "args": {
        "1": "la",
        "2": "solidāre"
      },
      "expansion": "Latin solidāre"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:mouten<ety:inh<ang:*mutian<ety:der<la:mūtō<id:move>>>>>",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *mey-?\nProto-Indo-European *meyth₂-der.\nLatin mūtōder.\nOld English *mutian\nMiddle English mouten\nEnglish moult"
    }
  ],
  "links": [
    [
      "*mey-",
      "Reconstruction:Proto-Indo-European/mey-#Proto-Indo-European:_change"
    ],
    [
      "*meyth₂-",
      "Reconstruction:Proto-Indo-European/meyth₂-"
    ],
    [
      "mūtō",
      "muto#Latin:_move"
    ],
    [
      "*mutian",
      "Reconstruction:Old English/mutian"
    ],
    [
      "mouten",
      "mouten#Middle_English"
    ],
    [
      "mouten",
      "mouten#Middle_English"
    ],
    [
      "*mutian",
      "Reconstruction:Old English/mutian"
    ],
    [
      "bemutian",
      "bemutian#Old_English"
    ],
    [
      "mūtō",
      "muto#Latin"
    ],
    [
      "mute",
      "mute#English"
    ],
    [
      "mutate",
      "mutate#English"
    ],
    [
      "fault",
      "fault#English"
    ],
    [
      "vault",
      "vault#English"
    ],
    [
      "solder",
      "solder#English"
    ],
    [
      "solidāre",
      "solidare#Latin"
    ],
    [
      "grapheme",
      "grapheme"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To undergo the process of shedding or losing a covering of hair or fur, feathers, skin, horns, etc, and replacing it with a fresh one; to change by moulting.",
        "To shed in such a manner."
      ],
      "tags": [
        "intransitive",
        "transitive"
      ],
      "recordId": "b7ac3137bfdf78e8ab0d52f17bfbd54ec8545b5ae9c6170d10f82067a0ac89ff",
      "rawRecordSha256": "4c6802bd9fd66bd6b853f6fe5af2b000127f23e0058bbc58c511267755a61aff",
      "sourceRecordOrdinal": 301823
    },
    {
      "pos": "noun",
      "glosses": [
        "The process of shedding or losing a covering of fur, feathers or skin etc.",
        "The skin or feathers cast off during the process of moulting."
      ],
      "tags": [],
      "recordId": "ce7eb687ff228bc166de42de5ad1abddfa2cf1cfec7d6553080600a0c14eb22b",
      "rawRecordSha256": "63f9ef4356eaf7417bb5c9a2459ba219000729ef98ce34708d611f42cdfaeaea",
      "sourceRecordOrdinal": 301822
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "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 moult →

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-bW91bHQ