*SET-U

English word origin

Etymology of thack

From Middle English thakken (“to stroke”), from Old English þaccian (“to touch gently, stroke, tap”), from Proto-West Germanic *þakwōn, from Proto-Germanic *þakwōną (“to touch lightly”), from Proto-Indo-European *teh₂g-

3 source sectionsExtended source reportWiktionary original ↗
In this entry · 3 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

Original entry ↗
verb

To strike or thump (someone or something); to thwack.

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

From Middle English thakken (“to stroke”), from Old English þaccian (“to touch gently, stroke, tap”), from Proto-West Germanic *þakwōn, from Proto-Germanic *þakwōną (“to touch lightly”), from Proto-Indo-European *teh₂g- (“to touch”). Cognate with Old Dutch þakolōn (“to stroke”), Old Norse þykkr (“a thwack, thump, blow”), Icelandic þjökka, þjaka (“to thwack, thump, beat”), Norwegian tjåka (“to strike, beat”), Latin tangō (“touch”). More at thwack, tangent.

Relationships mentioned by the source

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

  • Root classification mention*teh₂g-ine-pro
  • Inherited-form mentionthakkenenm · to stroke
  • Inherited-form mentionþaccianang · to touch gently, stroke, tap
  • Inherited-form mention*þakwōngmw-pro
  • Inherited-form mention*þakwōnągem-pro · to touch lightly
  • Derivation mention*teh₂g-ine-pro · to touch
  • Cognate mentionþakolōnodt · to stroke
  • Cognate mentionþykkrnon · a thwack, thump, blow
  • Cognate mentionþjökkais
  • Cognate mentiontjåkano · to strike, beat
  • Cognate mentiontangōla · touch
Inspect preserved source fields

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

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    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*teh₂g-",
        "id": "touch"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "thakken",
        "t": "to stroke"
      },
      "expansion": "Middle English thakken (“to stroke”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "þaccian",
        "t": "to touch gently, stroke, tap"
      },
      "expansion": "Old English þaccian (“to touch gently, stroke, tap”)"
    },
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        "3": "*þakwōn"
      },
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    },
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        "1": "en",
        "2": "gem-pro",
        "3": "*þakwōną",
        "t": "to touch lightly"
      },
      "expansion": "Proto-Germanic *þakwōną (“to touch lightly”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*teh₂g-",
        "t": "to touch"
      },
      "expansion": "Proto-Indo-European *teh₂g- (“to touch”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "odt",
        "2": "þakolōn",
        "t": "to stroke"
      },
      "expansion": "Old Dutch þakolōn (“to stroke”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "non",
        "2": "þykkr",
        "t": "a thwack, thump, blow"
      },
      "expansion": "Old Norse þykkr (“a thwack, thump, blow”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "þjökka"
      },
      "expansion": "Icelandic þjökka"
    },
    {
      "name": "cog",
      "args": {
        "1": "no",
        "2": "tjåka",
        "t": "to strike, beat"
      },
      "expansion": "Norwegian tjåka (“to strike, beat”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "tangō",
        "t": "touch"
      },
      "expansion": "Latin tangō (“touch”)"
    }
  ],
  "links": [
    [
      "thakken",
      "thakken#Middle_English"
    ],
    [
      "þaccian",
      "þaccian#Old_English"
    ],
    [
      "*þakwōn",
      "Reconstruction:Proto-West Germanic/þakwōn"
    ],
    [
      "*þakwōną",
      "Reconstruction:Proto-Germanic/þakwōną"
    ],
    [
      "*teh₂g-",
      "Reconstruction:Proto-Indo-European/teh₂g-"
    ],
    [
      "þakolōn",
      "þakolon#Old_Dutch"
    ],
    [
      "þykkr",
      "þykkr#Old_Norse"
    ],
    [
      "þjökka",
      "þjökka#Icelandic"
    ],
    [
      "þjaka",
      "þjaka#Icelandic"
    ],
    [
      "tjåka",
      "tjåka#Norwegian"
    ],
    [
      "tangō",
      "tango#Latin"
    ],
    [
      "thwack",
      "thwack#English"
    ],
    [
      "tangent",
      "tangent#English"
    ]
  ],
  "references": [],
  "descendants": [],
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        "To strike or thump (someone or something); to thwack."
      ],
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        "dialectal",
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}

Source etymology 2

Original entry ↗
intj

The sound of a thack.

noun

A stroke; a thwack.

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

From Middle English thacce, from thakken (“to stroke”): see etymology 1.

Relationships mentioned by the source

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

  • Inherited-form mentionthacceenm
Inspect preserved source fields

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

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      "name": "inh",
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        "3": "thacce"
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    }
  ],
  "links": [
    [
      "thacce",
      "thacce#Middle_English"
    ],
    [
      "thakken",
      "thakken#Middle_English"
    ],
    [
      "etymology 1",
      "#Etymology 1"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
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      "pos": "intj",
      "glosses": [
        "The sound of a thack."
      ],
      "tags": [],
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      "pos": "noun",
      "glosses": [
        "A stroke; a thwack."
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Source etymology 3

Original entry ↗
noun

The weatherproof outer layer of a roof, often specifically thatch.

verb

To cover a roof with thack.

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

From Middle English thak, thakk, thakke, from Old English þæc, from Proto-West Germanic *þak, from Proto-Germanic *þaką, from Proto-Indo-European *teg-. Cognate with Dutch dak, Low German Dack, Danish tag (“roof”), German Dach (“roof”), Old Norse þak (“thatch, roof”). Akin to Latin toga (“garment”) and Ancient Greek στέγος (stégos, “roof”). See also thatch and deck.

Relationships mentioned by the source

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

  • Inherited-form mentionthakenm
  • Inherited-form mentionþæcang
  • Inherited-form mention*þakgmw-pro
  • Inherited-form mention*þakągem-pro
  • Derivation mention*teg-ine-pro
  • Cognate mentiondaknl
  • Cognate mentionDacknds
  • Cognate mentiontagda · roof
  • Cognate mentionDachde · roof
  • Cognate mentionþaknon · thatch, roof
  • Doublet mentionthatchen
  • Doublet mentiondecken
Inspect preserved source fields

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

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      "name": "inh",
      "args": {
        "1": "en",
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        "3": "thak"
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    },
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      "args": {
        "1": "en",
        "2": "ang",
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    },
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        "2": "ine-pro",
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      },
      "expansion": "Proto-Indo-European *teg-"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "dak"
      },
      "expansion": "Dutch dak"
    },
    {
      "name": "cog",
      "args": {
        "1": "nds",
        "2": "Dack"
      },
      "expansion": "Low German Dack"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "tag",
        "t": "roof"
      },
      "expansion": "Danish tag (“roof”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Dach",
        "t": "roof"
      },
      "expansion": "German Dach (“roof”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "non",
        "2": "þak",
        "t": "thatch, roof"
      },
      "expansion": "Old Norse þak (“thatch, roof”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "thatch",
        "3": "deck",
        "notext": "1"
      },
      "expansion": "thatch and deck"
    }
  ],
  "links": [
    [
      "thak",
      "thak#Middle_English"
    ],
    [
      "thakk",
      "thakk#Middle_English"
    ],
    [
      "thakke",
      "thakke#Middle_English"
    ],
    [
      "þæc",
      "þæc#Old_English"
    ],
    [
      "*þak",
      "Reconstruction:Proto-West Germanic/þak"
    ],
    [
      "*þaką",
      "Reconstruction:Proto-Germanic/þaką"
    ],
    [
      "*teg-",
      "Reconstruction:Proto-Indo-European/teg-"
    ],
    [
      "dak",
      "dak#Dutch"
    ],
    [
      "Dack",
      "Dack#Low_German"
    ],
    [
      "tag",
      "tag#Danish"
    ],
    [
      "Dach",
      "Dach#German"
    ],
    [
      "þak",
      "þak#Old_Norse"
    ],
    [
      "toga",
      "toga#Latin"
    ],
    [
      "στέγος",
      "στέγος#Ancient_Greek"
    ],
    [
      "thatch",
      "thatch#English"
    ],
    [
      "deck",
      "deck#English"
    ]
  ],
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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 thack →

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
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Import run
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Permanent entry ID
w-dGhhY2s