*SET-U

English word origin

Etymology of demi-

Etymology tree Proto-Indo-European *dwóh₁ ▲ Proto-Indo-European *trísinflu. Proto-Indo-European *d(w)is- Proto-Italic *dis- Latin dis- Proto-Indo-European *me Proto-Indo-European *dʰeh₁-? Proto-Indo-European *-dʰe Proto-

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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 ↗
prefix

partial · half · Only the upper or front half of

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

Etymology tree Proto-Indo-European *dwóh₁ ▲ Proto-Indo-European *trísinflu. Proto-Indo-European *d(w)is- Proto-Italic *dis- Latin dis- Proto-Indo-European *me Proto-Indo-European *dʰeh₁-? Proto-Indo-European *-dʰe Proto-Indo-European *médʰi Proto-Indo-European *-os Proto-Indo-European *médʰyos Proto-Italic *meðios Latin medius Latin dīmidius Vulgar Latin *dimediusder. Anglo-Norman demibor. Middle English demi English demi- From Middle English demi (“half, half-sized, partial”), from Anglo-Norman demi (“half”), from Vulgar Latin *dimedius, from Latin dīmidius, from dis- (“apart; in two”) + medius (“middle”).

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": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:demi<ety:bor<xno:demi<ety:der<la-vul:*dimedius<ety:from<la:dīmidius>>>>>>",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *dwóh₁\n▲\nProto-Indo-European *trísinflu.\nProto-Indo-European *d(w)is-\nProto-Italic *dis-\nLatin dis-\nProto-Indo-European *me\nProto-Indo-European *dʰeh₁-?\nProto-Indo-European *-dʰe\nProto-Indo-European *médʰi\nProto-Indo-European *-os\nProto-Indo-European *médʰyos\nProto-Italic *meðios\nLatin medius\nLatin dīmidius\nVulgar Latin *dimediusder.\nAnglo-Norman demibor.\nMiddle English demi\nEnglish demi-\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"gloss\" : \"in two\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"alt\" : \"*d(w)is-\", \"gloss\" : \"in two, apart\", \"children\" : [ { \"terms\" : [ { \"id\" : \"two\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dwóh₁\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" }, { \"keyword_abbrev\" : \"influ.\", \"keyword_label\" : \"Influenced by\", \"terms\" : [ { \"id\" : \"thrice\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*trís\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"influence\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dwís\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*dis-\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"dis-\", \"status\" : \"ok\", \"lang\" : \"la\" }, { \"gloss\" : \"middle\", \"children\" : [ { \"terms\" : [ { \"id\" : \"middle\", \"children\" : [ { \"terms\" : [ { \"id\" : \"middle\", \"children\" : [ { \"terms\" : [ { \"id\" : \"with\", \"children\" : [ { \"terms\" : [ { \"id\" : \"in the middle of\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*me\", \"lang\" : \"ine-pro\" }, { \"id\" : \"locative suffix\", \"children\" : [ { \"terms\" : [ { \"is_uncertain\" : true, \"id\" : \"do\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dʰeh₁-\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-dʰe\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*médʰi\", \"lang\" : \"ine-pro\" }, { \"id\" : \"thematic\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-os\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*médʰyos\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*meðios\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"medius\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"Latin\", \"term\" : \"dīmidius\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Vulgar Latin\", \"term\" : \"*dimedius\", \"status\" : \"inline\", \"lang\" : \"la-vul\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Anglo-Norman\", \"term\" : \"demi\", \"status\" : \"inline\", \"lang\" : \"xno\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"demi\", \"status\" : \"inline\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"English\", \"term\" : \"demi-\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"demi-\">"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "demi",
        "4": "",
        "5": "half, half-sized, partial"
      },
      "expansion": "Middle English demi (“half, half-sized, partial”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "xno",
        "3": "demi",
        "4": "",
        "5": "half"
      },
      "expansion": "Anglo-Norman demi (“half”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la-vul",
        "3": "*dimedius"
      },
      "expansion": "Vulgar Latin *dimedius"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "dīmidius"
      },
      "expansion": "Latin dīmidius"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:demi<ety:bor<xno:demi<ety:der<la-vul:*dimedius<ety:from<la:dīmidius>>>>>>",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *dwóh₁\n▲\nProto-Indo-European *trísinflu.\nProto-Indo-European *d(w)is-\nProto-Italic *dis-\nLatin dis-\nProto-Indo-European *me\nProto-Indo-European *dʰeh₁-?\nProto-Indo-European *-dʰe\nProto-Indo-European *médʰi\nProto-Indo-European *-os\nProto-Indo-European *médʰyos\nProto-Italic *meðios\nLatin medius\nLatin dīmidius\nVulgar Latin *dimediusder.\nAnglo-Norman demibor.\nMiddle English demi\nEnglish demi-"
    }
  ],
  "links": [
    [
      "*dwóh₁",
      "Reconstruction:Proto-Indo-European/dwóh₁#Proto-Indo-European:_two"
    ],
    [
      "*trís",
      "Reconstruction:Proto-Indo-European/trís#Proto-Indo-European:_thrice"
    ],
    [
      "*d(w)is-",
      "Reconstruction:Proto-Indo-European/dwís"
    ],
    [
      "*dis-",
      "Reconstruction:Proto-Italic/dis-"
    ],
    [
      "dis-",
      "dis-#Latin"
    ],
    [
      "*me",
      "Reconstruction:Proto-Indo-European/me#Proto-Indo-European:_in_the_middle_of"
    ],
    [
      "*dʰeh₁-",
      "Reconstruction:Proto-Indo-European/dʰeh₁-#Proto-Indo-European:_do"
    ],
    [
      "*-dʰe",
      "Reconstruction:Proto-Indo-European/-dʰe#Proto-Indo-European:_locative_suffix"
    ],
    [
      "*médʰi",
      "Reconstruction:Proto-Indo-European/médʰi#Proto-Indo-European:_with"
    ],
    [
      "*-os",
      "Reconstruction:Proto-Indo-European/-os#Proto-Indo-European:_thematic"
    ],
    [
      "*médʰyos",
      "Reconstruction:Proto-Indo-European/médʰyos#Proto-Indo-European:_middle"
    ],
    [
      "*meðios",
      "Reconstruction:Proto-Italic/meðios#Proto-Italic:_middle"
    ],
    [
      "medius",
      "medius#Latin"
    ],
    [
      "dīmidius",
      "dimidius#Latin"
    ],
    [
      "*dimedius",
      "Reconstruction:Latin/dimedius"
    ],
    [
      "demi",
      "demi#Old_French"
    ],
    [
      "demi",
      "demi#Middle_English"
    ],
    [
      "demi",
      "demi#Middle_English"
    ],
    [
      "demi",
      "demi#Old_French"
    ],
    [
      "*dimedius",
      "Reconstruction:Latin/dimedius"
    ],
    [
      "dīmidius",
      "dimidius#Latin"
    ],
    [
      "dis-",
      "dis-#Latin"
    ],
    [
      "medius",
      "medius#Latin"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "prefix",
      "glosses": [
        "partial",
        "half",
        "Only the upper or front half of"
      ],
      "tags": [
        "morpheme"
      ],
      "recordId": "ec1045ffd4519fdaa3f51f4b94b74fc4e8ceb3e0a9d8a66d0a8402ad2862ee81",
      "rawRecordSha256": "8e53b87c95e601451883dc6815e626ddce4c2b32e372ed250e3b992a32f019e2",
      "sourceRecordOrdinal": 182476
    }
  ],
  "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 demi- →

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-ZGVtaS0