*SET-U

English word origin

Etymology of month

Etymology tree Proto-Indo-European *med- Proto-Indo-European *meh₁-? Proto-Indo-European *mḗh₁n̥sder. Proto-Germanic *mēnōþs Proto-West Germanic *mānōþ Old English mōnaþ Middle English mon(e)th English month From Middle

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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 ↗
noun

A period into which a year is divided, historically based on the phases of the moon. · A period of 30 days, 31 days, or some alternation thereof. · A woman's period; menstrual discharge.

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

Etymology tree Proto-Indo-European *med- Proto-Indo-European *meh₁-? Proto-Indo-European *mḗh₁n̥sder. Proto-Germanic *mēnōþs Proto-West Germanic *mānōþ Old English mōnaþ Middle English mon(e)th English month From Middle English mon(e)th, from Old English mōnaþ, from Proto-West Germanic *mānōþ, from Proto-Germanic *mēnōþs (“month”), from Proto-Indo-European *mḗh₁n̥s (“moon, month”), probably derived from *meh₁- (“measure”) with moon-cycles being used to measure time. Related to moon. Cognate with Saterland Frisian Mound (“month”), Dutch maand (“month”), German Low German Maand (“month”), German Monat (“month”), Danish måned (“month”), Swedish månad (“month”), Icelandic mánuður (“month”). Eclipsed non-native Old English calend (“month”), borrowed from Latin calendae.

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": "ety",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:moneth<alt:mon(e)th>",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *med-\nProto-Indo-European *meh₁-?\nProto-Indo-European *mḗh₁n̥sder.\nProto-Germanic *mēnōþs\nProto-West Germanic *mānōþ\nOld English mōnaþ\nMiddle English mon(e)th\nEnglish month\n[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"is_uncertain\" : true, \"id\" : \"measure\", \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*med-\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*meh₁-\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*mḗh₁n̥s\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Germanic\", \"term\" : \"*mēnōþs\", \"status\" : \"ok\", \"lang\" : \"gem-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-West Germanic\", \"term\" : \"*mānōþ\", \"status\" : \"ok\", \"lang\" : \"gmw-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old English\", \"term\" : \"mōnaþ\", \"status\" : \"ok\", \"lang\" : \"ang\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" }, { \"terms\" : [ { \"id\" : \"moon\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"Moon\", \"children\" : [ { \"terms\" : [ { \"is_duplicate\" : true, \"children\" : [ ], \"id\" : \"Moon\", \"status\" : { \"1\" : \"ine-pro\", \"2\" : \"*meh₁-<id:measure><unc:1>\", \"id\" : \"Moon\", \"pos\" : \"word\" }, \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*mḗh₁n̥s\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Germanic\", \"term\" : \"*mēnô\", \"lang\" : \"gem-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-West Germanic\", \"term\" : \"*mānō\", \"status\" : \"ok\", \"lang\" : \"gmw-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old English\", \"term\" : \"mōna\", \"status\" : \"ok\", \"lang\" : \"ang\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Middle English\", \"term\" : \"mone\", \"lang\" : \"enm\" }, { \"children\" : [ { \"terms\" : [ { \"id\" : \"u-stem\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"nominative\", \"children\" : [ { \"terms\" : [ { \"id\" : \"action noun\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-tus\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Germanic\", \"term\" : \"*-þuz\", \"lang\" : \"gem-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-West Germanic\", \"term\" : \"*-þu\", \"status\" : \"inline\", \"lang\" : \"gmw-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Old English\", \"term\" : \"-þ\", \"lang\" : \"ang\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"-th\", \"status\" : \"ok\", \"lang\" : \"enm\" } ], \"is_group\" : true, \"keyword\" : \"afeq\", \"is_invisible\" : \"all\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"moneth\", \"status\" : \"ok\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"English\", \"term\" : \"month\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"month\">"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "moneth",
        "4": "mon(e)th"
      },
      "expansion": "Middle English mon(e)th"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "mōnaþ"
      },
      "expansion": "Old English mōnaþ"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gmw-pro",
        "3": "*mānōþ"
      },
      "expansion": "Proto-West Germanic *mānōþ"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*mēnōþs",
        "t": "month"
      },
      "expansion": "Proto-Germanic *mēnōþs (“month”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*mḗh₁n̥s",
        "t": "moon, month"
      },
      "expansion": "Proto-Indo-European *mḗh₁n̥s (“moon, month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "stq",
        "2": "Mound",
        "t": "month"
      },
      "expansion": "Saterland Frisian Mound (“month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "maand",
        "t": "month"
      },
      "expansion": "Dutch maand (“month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nds-de",
        "2": "Maand",
        "t": "month"
      },
      "expansion": "German Low German Maand (“month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Monat",
        "t": "month"
      },
      "expansion": "German Monat (“month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "måned",
        "t": "month"
      },
      "expansion": "Danish måned (“month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "månad",
        "t": "month"
      },
      "expansion": "Swedish månad (“month”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "mánuður",
        "t": "month"
      },
      "expansion": "Icelandic mánuður (“month”)"
    },
    {
      "name": "ncog",
      "args": {
        "1": "ang",
        "2": "calend",
        "t": "month"
      },
      "expansion": "Old English calend (“month”)"
    },
    {
      "name": "ncog",
      "args": {
        "1": "la",
        "2": "kalendae",
        "3": "calendae"
      },
      "expansion": "Latin calendae"
    },
    {
      "name": "ety",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:moneth<alt:mon(e)th>",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *med-\nProto-Indo-European *meh₁-?\nProto-Indo-European *mḗh₁n̥sder.\nProto-Germanic *mēnōþs\nProto-West Germanic *mānōþ\nOld English mōnaþ\nMiddle English mon(e)th\nEnglish month"
    }
  ],
  "links": [
    [
      "*med-",
      "Reconstruction:Proto-Indo-European/med-"
    ],
    [
      "*meh₁-",
      "Reconstruction:Proto-Indo-European/meh₁-#Proto-Indo-European:_measure"
    ],
    [
      "*mḗh₁n̥s",
      "Reconstruction:Proto-Indo-European/mḗh₁n̥s"
    ],
    [
      "*mēnōþs",
      "Reconstruction:Proto-Germanic/mēnōþs"
    ],
    [
      "*mānōþ",
      "Reconstruction:Proto-West Germanic/mānōþ"
    ],
    [
      "mōnaþ",
      "monaþ#Old_English"
    ],
    [
      "mon(e)th",
      "moneth#Middle_English"
    ],
    [
      "mon(e)th",
      "moneth#Middle_English"
    ],
    [
      "mōnaþ",
      "monaþ#Old_English"
    ],
    [
      "*mānōþ",
      "Reconstruction:Proto-West Germanic/mānōþ"
    ],
    [
      "*mēnōþs",
      "Reconstruction:Proto-Germanic/mēnōþs"
    ],
    [
      "*mḗh₁n̥s",
      "Reconstruction:Proto-Indo-European/mḗh₁n̥s"
    ],
    [
      "*meh₁-",
      "Reconstruction:Proto-Indo-European/meh₁-"
    ],
    [
      "moon",
      "moon#English"
    ],
    [
      "Mound",
      "Mound#Saterland_Frisian"
    ],
    [
      "maand",
      "maand#Dutch"
    ],
    [
      "Maand",
      "Maand#Low_German"
    ],
    [
      "Monat",
      "Monat#German"
    ],
    [
      "måned",
      "måned#Danish"
    ],
    [
      "månad",
      "månad#Swedish"
    ],
    [
      "mánuður",
      "mánuður#Icelandic"
    ],
    [
      "calend",
      "calend#Old_English"
    ],
    [
      "calendae",
      "kalendae#Latin"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A period into which a year is divided, historically based on the phases of the moon.",
        "A period of 30 days, 31 days, or some alternation thereof.",
        "A woman's period; menstrual discharge."
      ],
      "tags": [
        "in-plural",
        "obsolete"
      ],
      "recordId": "03215c6b86cdb0736658f122449a6ffa5801f91c1c8a78f1cc779f45b2ee32a0",
      "rawRecordSha256": "715efc332f8a8dff756416ede906b271ca2234230fa5884f016b4fe7be145379",
      "sourceRecordOrdinal": 545
    }
  ],
  "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 month →

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-bW9udGg