*SET-U

English word origin

Etymology of must

From Middle English moste ("must", literally, "had to", the past tense of Middle English moten (“to have to”)), from Old English mōste (“had to”), 1st & 3rd person singular past tense of mōtan (“to be allowed, be able to

4 source sectionsExtended source reportWiktionary original ↗
In this entry · 4 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 · variant 1/2

Original entry ↗
noun

Something that is mandatory, required or recommended.

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

From Middle English moste ("must", literally, "had to", the past tense of Middle English moten (“to have to”)), from Old English mōste (“had to”), 1st & 3rd person singular past tense of mōtan (“to be allowed, be able to, have the opportunity to, be compelled to, must, may”), from Proto-Germanic *mōtaną. Cognate with Dutch moest (“had to”), German musste (“had to”), Swedish måste (“must, have to, be obliged to”). More at mote.

Relationships mentioned by the source

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

  • Root classification mention*med-ine-pro
  • Inherited-form mentionmosteenm
  • Derivation mentionmotenenm · to have to
  • Inherited-form mentionmōsteang
  • Derivation mention*mōtanągem-pro
  • Cognate mentionmoestnl
  • Cognate mentionmusstede
  • Cognate mentionmåstesv
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": "*med-"
      },
      "expansion": ""
    },
    {
      "name": "etymid",
      "args": {
        "1": "en",
        "2": "hasto"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "moste"
      },
      "expansion": "Middle English moste"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "moten",
        "t": "to have to",
        "id": "to have to"
      },
      "expansion": "Middle English moten (“to have to”)"
    },
    {
      "name": "gloss",
      "args": {
        "1": "\"must\", literally, \"had to\", the past tense of Middle English <i class=\"Latn mention\" lang=\"enm\">moten</i> (“to have to”)"
      },
      "expansion": "(\"must\", literally, \"had to\", the past tense of Middle English moten (“to have to”))"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "mōste",
        "4": "",
        "5": "had to"
      },
      "expansion": "Old English mōste (“had to”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*mōtaną"
      },
      "expansion": "Proto-Germanic *mōtaną"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "moest",
        "3": "",
        "4": "had to"
      },
      "expansion": "Dutch moest (“had to”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "musste",
        "3": "",
        "4": "had to"
      },
      "expansion": "German musste (“had to”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "måste",
        "3": "",
        "4": "must, have to, be obliged to"
      },
      "expansion": "Swedish måste (“must, have to, be obliged to”)"
    }
  ],
  "links": [
    [
      "moste",
      "moste#Middle_English"
    ],
    [
      "Middle English",
      "w:Middle English"
    ],
    [
      "moten",
      "moten#Middle_English:_to_have_to"
    ],
    [
      "mōste",
      "moste#Old_English"
    ],
    [
      "mōtan",
      "motan#Old_English"
    ],
    [
      "*mōtaną",
      "Reconstruction:Proto-Germanic/mōtaną"
    ],
    [
      "moest",
      "moest#Dutch"
    ],
    [
      "musste",
      "musste#German"
    ],
    [
      "måste",
      "måste#Swedish"
    ],
    [
      "mote",
      "mote#Etymology_2"
    ]
  ],
  "references": [],
  "descendants": [
    {
      "lang": "Dutch",
      "lang_code": "nl",
      "word": "must",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "French",
      "lang_code": "fr",
      "word": "must",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "Finnish",
      "lang_code": "fi",
      "word": "must",
      "raw_tags": [
        "borrowed"
      ]
    }
  ],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Something that is mandatory, required or recommended."
      ],
      "tags": [
        "auxiliary",
        "defective",
        "modal"
      ],
      "recordId": "5bd86df7675db817ede35d96a53337fca63f75a1587ef3f09519f3ff97d2815c",
      "rawRecordSha256": "61dde08e78c0e9fc5edcf8a41bd71d4efdff75d31294ba2a86a2306892cd2007",
      "sourceRecordOrdinal": 147819
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Source etymology 1 · variant 2/2

Original entry ↗
verb

To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence. · To do with certainty; indicates that the speaker is certain that the subject will have executed the predicate. · Used to indicate that something is very likely, probable, or certain to be true.

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

From Middle English moste ("must", literally, "had to", the past tense of Middle English moten (“to have to”)), from Old English mōste (“had to”), 1st & 3rd person singular past tense of mōtan (“to be allowed, be able to, have the opportunity to, be compelled to, must, may”), from Proto-Germanic *mōtaną. Cognate with Dutch moest (“had to”), German musste (“had to”), Swedish måste (“must, have to, be obliged to”). More at mote.

Relationships mentioned by the source

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

  • Root classification mention*med-ine-pro
  • Inherited-form mentionmosteenm
  • Derivation mentionmotenenm · to have to
  • Inherited-form mentionmōsteang
  • Derivation mention*mōtanągem-pro
  • Cognate mentionmoestnl
  • Cognate mentionmusstede
  • Cognate mentionmåstesv
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": "*med-"
      },
      "expansion": ""
    },
    {
      "name": "etymid",
      "args": {
        "1": "en",
        "2": "hasto"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "moste"
      },
      "expansion": "Middle English moste"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "moten",
        "t": "to have to",
        "id": "to have to"
      },
      "expansion": "Middle English moten (“to have to”)"
    },
    {
      "name": "gloss",
      "args": {
        "1": "\"must\", literally, \"had to\", the past tense of Middle English <i class=\"Latn mention\" lang=\"enm\">moten</i> (“to have to”)"
      },
      "expansion": "(\"must\", literally, \"had to\", the past tense of Middle English moten (“to have to”))"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "mōste",
        "4": "",
        "5": "had to"
      },
      "expansion": "Old English mōste (“had to”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*mōtaną"
      },
      "expansion": "Proto-Germanic *mōtaną"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "moest",
        "3": "",
        "4": "had to"
      },
      "expansion": "Dutch moest (“had to”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "musste",
        "3": "",
        "4": "had to"
      },
      "expansion": "German musste (“had to”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "måste",
        "3": "",
        "4": "must, have to, be obliged to"
      },
      "expansion": "Swedish måste (“must, have to, be obliged to”)"
    }
  ],
  "links": [
    [
      "moste",
      "moste#Middle_English"
    ],
    [
      "Middle English",
      "w:Middle English"
    ],
    [
      "moten",
      "moten#Middle_English:_to_have_to"
    ],
    [
      "mōste",
      "moste#Old_English"
    ],
    [
      "mōtan",
      "motan#Old_English"
    ],
    [
      "*mōtaną",
      "Reconstruction:Proto-Germanic/mōtaną"
    ],
    [
      "moest",
      "moest#Dutch"
    ],
    [
      "musste",
      "musste#German"
    ],
    [
      "måste",
      "måste#Swedish"
    ],
    [
      "mote",
      "mote#Etymology_2"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.",
        "To do with certainty; indicates that the speaker is certain that the subject will have executed the predicate.",
        "Used to indicate that something is very likely, probable, or certain to be true."
      ],
      "tags": [
        "auxiliary",
        "defective",
        "modal",
        "no-past-participle",
        "no-present-participle"
      ],
      "recordId": "050ce456a28bbc2aa19abdb10f23a62a6ca3e4298b80f6c091fc6537e293b2b9",
      "rawRecordSha256": "5feb69788a18c1fc1e0962914ca5fbc97630a330fd8dc7e0059ed86d7a74da6f",
      "sourceRecordOrdinal": 147818
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Source etymology 2

Original entry ↗
noun

The property of being stale or musty. · Something that exhibits the property of being stale or musty. · Fruit juice that will ferment or has fermented, usually from grapes (in winemaking) or apples (in cidermaking).

verb

To make musty. · To become musty.

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

From Middle English must, from Old English must and Old French must, most, both from Latin mustum.

Relationships mentioned by the source

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

  • Inherited-form mentionmustenm
  • Inherited-form mentionmustang
  • Derivation mentionmustfro
  • Derivation mentionmustumla
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "etymid",
      "args": {
        "1": "en",
        "2": "ferment"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "must"
      },
      "expansion": "Middle English must"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "must"
      },
      "expansion": "Old English must"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "must"
      },
      "expansion": "Old French must"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "mustum"
      },
      "expansion": "Latin mustum"
    }
  ],
  "links": [
    [
      "must",
      "must#Middle_English"
    ],
    [
      "must",
      "must#Old_English"
    ],
    [
      "must",
      "must#Old_French"
    ],
    [
      "most",
      "most#Old_French"
    ],
    [
      "mustum",
      "mustum#Latin"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The property of being stale or musty.",
        "Something that exhibits the property of being stale or musty.",
        "Fruit juice that will ferment or has fermented, usually from grapes (in winemaking) or apples (in cidermaking)."
      ],
      "tags": [
        "auxiliary",
        "countable",
        "defective",
        "modal",
        "uncountable"
      ],
      "recordId": "d93870adffcd35ecdcc006ad4e2616318aaf053eb5e12619d1d98cad83aba779",
      "rawRecordSha256": "141a2d9770b1bbb94336c13f7b6fe6bf73cd10d2da70094c3da6a3b75ccdfed4",
      "sourceRecordOrdinal": 147820
    },
    {
      "pos": "verb",
      "glosses": [
        "To make musty.",
        "To become musty."
      ],
      "tags": [
        "auxiliary",
        "defective",
        "modal",
        "transitive",
        "intransitive"
      ],
      "recordId": "e8032a4abf2ba90a0280d9b6a4656ee92fceb36e89e3b903dc1ab682df1650cf",
      "rawRecordSha256": "2da147d40c7770efefeaaf5e64ed3a919fb69f3652bb73341c249e6dd483e3d1",
      "sourceRecordOrdinal": 147821
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Source etymology 3

Original entry ↗
noun

Alternative spelling of musth.

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

See musth.

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "etymid",
      "args": {
        "1": "en",
        "2": "mating"
      },
      "expansion": ""
    }
  ],
  "links": [
    [
      "musth",
      "musth#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Alternative spelling of musth."
      ],
      "tags": [
        "alt-of",
        "alternative",
        "auxiliary",
        "countable",
        "defective",
        "modal",
        "uncountable"
      ],
      "recordId": "bc652e2ac86856a4ab9fa9f82d4fb33621d0b5401f876d9e90814a75d4163b92",
      "rawRecordSha256": "c481a4b79b16a3591939b4ea6354b8017f4edf1fea4f3e38f52d23b0d80a3a42",
      "sourceRecordOrdinal": 147822
    }
  ],
  "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 must →

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-bXVzdA