*SET-U

English word origin

Etymology of twi-

From Middle English twi-, from Old English twi- (“two, double”), from Proto-Germanic *twi- (“two-, double-”), from Proto-Indo-European *dwi- (“two-, double-”) (compare Proto-Germanic *twiz- (“twice”), from Proto-Indo-Eur

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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

two · double, both

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

From Middle English twi-, from Old English twi- (“two, double”), from Proto-Germanic *twi- (“two-, double-”), from Proto-Indo-European *dwi- (“two-, double-”) (compare Proto-Germanic *twiz- (“twice”), from Proto-Indo-European *dwís (“twice”)), from Proto-Indo-European *dwóh₁ (“two”). Compare twin, twice, two, and see more details at two. Further related to the prefixes bi-, di-, and dis-. Cognate with German zwie- (“twice”), Swedish tve- (“twi-, double”), Russian дву- (dvu-), двух- (dvux-) Old Prussian dwi- (“twi-”), Latin bi-, bis (“twice”) (< Old Latin dui-, duis).

Relationships mentioned by the source

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

  • Inherited-form mentiontwi-enm
  • Inherited-form mentiontwi-ang · two, double
  • Inherited-form mention*twi-gem-pro · two-, double-
  • Inherited-form mention*dwi-ine-pro · two-, double-
  • Derivation mention*dwóh₁ine-pro · two
  • Cognate mentionzwie-de · twice
  • Cognate mentiontve-sv · twi-, double
  • Cognate mentionдву-ru
  • Cognate mentiondwi-prg · twi-
  • Cognate mentionbi-la
  • Cognate mentiondui-la
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "dercat",
      "args": {
        "1": "en",
        "2": "ine-pro"
      },
      "expansion": ""
    },
    {
      "name": "langname",
      "args": {
        "1": "ine-pro"
      },
      "expansion": "Proto-Indo-European"
    },
    {
      "name": "word",
      "args": {
        "1": "en",
        "2": "ine",
        "3": "dwóh₁"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "twi-"
      },
      "expansion": "Middle English twi-"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "twi-",
        "t": "two, double"
      },
      "expansion": "Old English twi- (“two, double”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*twi-",
        "t": "two-, double-"
      },
      "expansion": "Proto-Germanic *twi- (“two-, double-”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*dwi-",
        "t": "two-, double-"
      },
      "expansion": "Proto-Indo-European *dwi- (“two-, double-”)"
    },
    {
      "name": "m+",
      "args": {
        "1": "gem-pro",
        "2": "*twiz-",
        "t": "twice"
      },
      "expansion": "Proto-Germanic *twiz- (“twice”)"
    },
    {
      "name": "m+",
      "args": {
        "1": "ine-pro",
        "2": "*dwís",
        "t": "twice"
      },
      "expansion": "Proto-Indo-European *dwís (“twice”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*dwóh₁",
        "t": "two"
      },
      "expansion": "Proto-Indo-European *dwóh₁ (“two”)"
    },
    {
      "name": "dbt",
      "args": {
        "1": "en",
        "2": "bi-",
        "3": "di-",
        "4": "dis-",
        "notext": "1"
      },
      "expansion": "bi-, di-, and dis-"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "zwie-",
        "t": "twice"
      },
      "expansion": "German zwie- (“twice”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "tve-",
        "t": "twi-, double"
      },
      "expansion": "Swedish tve- (“twi-, double”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ru",
        "2": "дву-"
      },
      "expansion": "Russian дву- (dvu-)"
    },
    {
      "name": "cog",
      "args": {
        "1": "prg",
        "2": "dwi-",
        "t": "twi-"
      },
      "expansion": "Old Prussian dwi- (“twi-”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "bi-"
      },
      "expansion": "Latin bi-"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "dui-"
      },
      "expansion": "Latin dui-"
    }
  ],
  "links": [
    [
      "twi-",
      "twi-#Middle_English"
    ],
    [
      "twi-",
      "twi-#Old_English"
    ],
    [
      "*twi-",
      "Reconstruction:Proto-Germanic/twi-"
    ],
    [
      "*dwi-",
      "Reconstruction:Proto-Indo-European/dwi-"
    ],
    [
      "*twiz-",
      "Reconstruction:Proto-Germanic/twiz-"
    ],
    [
      "*dwís",
      "Reconstruction:Proto-Indo-European/dwís"
    ],
    [
      "*dwóh₁",
      "Reconstruction:Proto-Indo-European/dwóh₁"
    ],
    [
      "twin",
      "twin#English"
    ],
    [
      "twice",
      "twice#English"
    ],
    [
      "two",
      "two#English"
    ],
    [
      "two",
      "two#English"
    ],
    [
      "bi-",
      "bi-#English"
    ],
    [
      "di-",
      "di-#English"
    ],
    [
      "dis-",
      "dis-#English"
    ],
    [
      "zwie-",
      "zwie-#German"
    ],
    [
      "tve-",
      "tve-#Swedish"
    ],
    [
      "дву-",
      "дву-#Russian"
    ],
    [
      "двух-",
      "двух-#Russian"
    ],
    [
      "dwi-",
      "dwi-#Old_Prussian"
    ],
    [
      "bi-",
      "bi-#Latin"
    ],
    [
      "bis",
      "bis#Latin"
    ],
    [
      "dui-",
      "dui-#Latin"
    ],
    [
      "duis",
      "duis#Latin"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "prefix",
      "glosses": [
        "two",
        "double, both"
      ],
      "tags": [
        "idiomatic",
        "morpheme",
        "rare"
      ],
      "recordId": "b3711b85870d084cad5408d828a9a15d6bcdf3c8ee515e07d16ea74bd2b97697",
      "rawRecordSha256": "593b128320b405c6f29b946918fb26ae36cd29ce1e7f15b88f3c9c349b90dca0",
      "sourceRecordOrdinal": 277922
    }
  ],
  "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 twi- →

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-dHdpLQ