*SET-U

English word origin

Etymology of theft

From Middle English theft, thefte, þefte, þefþe, þiefþe, Old English þīefþ, from Proto-West Germanic *þiubīþu, from Proto-Germanic *þiubīþō (“theft”), from *þiubijaną (“to thieve, steal”), equivalent to thieve + -t (abst

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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

The act of stealing property.

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

From Middle English theft, thefte, þefte, þefþe, þiefþe, Old English þīefþ, from Proto-West Germanic *þiubīþu, from Proto-Germanic *þiubīþō (“theft”), from *þiubijaną (“to thieve, steal”), equivalent to thieve + -t (abstract nominal suffix). Cognate with West Frisian tsjeafte (“theft”), dialectal Dutch diefte (“theft”), obsolete German Diebde (“theft”), Icelandic þýfð (“theft”).

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": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "theft"
      },
      "expansion": "Middle English theft"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "þīefþ"
      },
      "expansion": "Old English þīefþ"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gmw-pro",
        "3": "*þiubiþu",
        "4": "*þiubīþu"
      },
      "expansion": "Proto-West Germanic *þiubīþu"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*þiubiþō",
        "4": "*þiubīþō",
        "t": "theft"
      },
      "expansion": "Proto-Germanic *þiubīþō (“theft”)"
    },
    {
      "name": "suffix",
      "args": {
        "1": "en",
        "2": "thieve",
        "3": "t",
        "id2": "th",
        "pos2": "abstract nominal suffix"
      },
      "expansion": "thieve + -t (abstract nominal suffix)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "tsjeafte",
        "t": "theft"
      },
      "expansion": "West Frisian tsjeafte (“theft”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "diefte",
        "t": "theft"
      },
      "expansion": "Dutch diefte (“theft”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Diebde",
        "t": "theft"
      },
      "expansion": "German Diebde (“theft”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "þýfð",
        "t": "theft"
      },
      "expansion": "Icelandic þýfð (“theft”)"
    }
  ],
  "links": [
    [
      "theft",
      "theft#Middle_English"
    ],
    [
      "thefte",
      "thefte#Middle_English"
    ],
    [
      "þefte",
      "þefte#Middle_English"
    ],
    [
      "þefþe",
      "þefþe#Middle_English"
    ],
    [
      "þiefþe",
      "þiefþe#Middle_English"
    ],
    [
      "þīefþ",
      "þiefþ#Old_English"
    ],
    [
      "*þiubīþu",
      "Reconstruction:Proto-West Germanic/þiubiþu"
    ],
    [
      "*þiubīþō",
      "Reconstruction:Proto-Germanic/þiubiþō"
    ],
    [
      "*þiubijaną",
      "Reconstruction:Proto-Germanic/þiubijaną"
    ],
    [
      "thieve",
      "thieve#English"
    ],
    [
      "-t",
      "-t#English:_th"
    ],
    [
      "tsjeafte",
      "tsjeafte#West_Frisian"
    ],
    [
      "diefte",
      "diefte#Dutch"
    ],
    [
      "Diebde",
      "Diebde#German"
    ],
    [
      "þýfð",
      "þýfð#Icelandic"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The act of stealing property."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "recordId": "847ea0a3d69284e843c700bc9274a1bd7349354fabf725c85dd44927ce1ce2a7",
      "rawRecordSha256": "0800fa84593290c61fdfbd114343ac3ab588f52fb0bf8c2636afa33274f3b44b",
      "sourceRecordOrdinal": 206202
    }
  ],
  "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 theft →

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-dGhlZnQ