*SET-U

English word origin

Etymology of thick

From Middle English thikke, from Old English þicce (“thick, dense”), from Proto-West Germanic *þikkwī, from Proto-Germanic *þekuz (“thick”), from Proto-Indo-European *tégus (“thick”). Cognates Cognate with North Frisian

1 source sectionExtended source reportWiktionary original ↗
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 ↗
det

Alternative form of thilk (“that same”).

noun

The thickest, or most active or intense, part of something. · A thicket. · A stupid person; a fool.

adv

In a thick manner. · Frequently or numerously.

adj

Relatively great in extent from one surface to the opposite in its smallest solid dimension. · Measuring a certain number of units in this dimension. · Heavy in build; thickset. · Densely crowded or packed.

verb

To thicken.

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

From Middle English thikke, from Old English þicce (“thick, dense”), from Proto-West Germanic *þikkwī, from Proto-Germanic *þekuz (“thick”), from Proto-Indo-European *tégus (“thick”). Cognates Cognate with North Frisian sjok, tjok, tjuk, tschok (“thick”), Saterland Frisian tjuk (“thick”), West Frisian dik, tuuk (“thick”), Central Franconian deck (“thick”), Cimbrian dikh, dikhe (“thick”), Dutch dik (“thick”), German dick (“thick”), Luxembourgish déck (“thick”), Yiddish דיק (dik, “thick”), Danish tyk (“thick”), Elfdalian tiokk (“thick”), Faroese tjúkkur (“thick”), Icelandic þykkur (“thick”), Norwegian Bokmål and Norwegian Nynorsk tjukk, tykk (“thick”), Scanian tjykker (“thick”), Swedish tjock (“thick”); also Cornish and Welsh tew (“thick”), Irish tiubh, tiugh (“thick”), Manx çhiu (“thick”), Scottish Gaelic tiugh (“thick”).

Relationships mentioned by the source

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

  • Root classification mention*(s)teg- (pole)ine-pro
  • Inherited-form mentionthikkeenm
  • Inherited-form mentionþicceang
  • Inherited-form mention*þikkwīgmw-pro
  • Inherited-form mention*þekuzgem-pro · thick
  • Inherited-form mention*tégusine-pro · thick
  • Cognate mentionsjokfrr
  • Cognate mentiontjukstq · thick
  • Cognate mentiondikfy
  • Cognate mentiondeckgmw-cfr · thick
  • Cognate mentiondikhcim
  • Cognate mentiondiknl · thick
  • Cognate mentiondickde · thick
  • Cognate mentiondécklb · thick
  • Cognate mentionדיקyi · thick
  • Cognate mentiontykda · thick
  • Cognate mentiontiokkovd · thick
  • Cognate mentiontjúkkurfo · thick
  • Cognate mentionþykkuris · thick
  • Cognate mentiontjykkergmq-scy · thick
  • Cognate mentiontjocksv · thick
  • Cognate mentiontiubhga
  • Cognate mentionçhiugv · thick
  • Cognate mentiontiughgd · thick

This page abbreviates 11 auxiliary source items. The etymology narrative is not shortened. Omission counts are available in the audit fields below; consult the original for complete auxiliary material.

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*(s)teg- (pole)"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "thikke",
        "4": ""
      },
      "expansion": "Middle English thikke"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "þicce",
        "4": "",
        "5": "thick, dense"
      },
      "expansion": "Old English þicce (“thick, dense”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gmw-pro",
        "3": "*þikkwī"
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      "expansion": "Proto-West Germanic *þikkwī"
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    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*þekuz",
        "t": "thick"
      },
      "expansion": "Proto-Germanic *þekuz (“thick”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*tégus",
        "t": "thick"
      },
      "expansion": "Proto-Indo-European *tégus (“thick”)"
    },
    {
      "name": "col-top",
      "args": {
        "1": "2",
        "2": "cog"
      },
      "expansion": "Cognates"
    },
    {
      "name": "cog",
      "args": {
        "1": "frr",
        "2": "sjok"
      },
      "expansion": "North Frisian sjok"
    },
    {
      "name": "cog",
      "args": {
        "1": "stq",
        "2": "tjuk",
        "t": "thick"
      },
      "expansion": "Saterland Frisian tjuk (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "dik"
      },
      "expansion": "West Frisian dik"
    },
    {
      "name": "cog",
      "args": {
        "1": "gmw-cfr",
        "2": "deck",
        "t": "thick"
      },
      "expansion": "Central Franconian deck (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "cim",
        "2": "dikh"
      },
      "expansion": "Cimbrian dikh"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "dik",
        "t": "thick"
      },
      "expansion": "Dutch dik (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "dick",
        "t": "thick"
      },
      "expansion": "German dick (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "lb",
        "2": "déck",
        "t": "thick"
      },
      "expansion": "Luxembourgish déck (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "yi",
        "2": "דיק",
        "t": "thick"
      },
      "expansion": "Yiddish דיק (dik, “thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "tyk",
        "t": "thick"
      },
      "expansion": "Danish tyk (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ovd",
        "2": "tiokk",
        "t": "thick"
      },
      "expansion": "Elfdalian tiokk (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fo",
        "2": "tjúkkur",
        "t": "thick"
      },
      "expansion": "Faroese tjúkkur (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "þykkur",
        "t": "thick"
      },
      "expansion": "Icelandic þykkur (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nb,nn",
        "2": "tjukk"
      },
      "expansion": "Norwegian Bokmål and Norwegian Nynorsk tjukk"
    },
    {
      "name": "cog",
      "args": {
        "1": "gmq-scy",
        "2": "tjykker",
        "t": "thick"
      },
      "expansion": "Scanian tjykker (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "tjock",
        "t": "thick"
      },
      "expansion": "Swedish tjock (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "kw,cy",
        "2": "tew",
        "t": "thick"
      },
      "expansion": "Cornish and Welsh tew (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ga",
        "2": "tiubh"
      },
      "expansion": "Irish tiubh"
    },
    {
      "name": "cog",
      "args": {
        "1": "gv",
        "2": "çhiu",
        "t": "thick"
      },
      "expansion": "Manx çhiu (“thick”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "gd",
        "2": "tiugh",
        "t": "thick"
      },
      "expansion": "Scottish Gaelic tiugh (“thick”)"
    }
  ],
  "links": [
    [
      "thikke",
      "thikke#Middle_English"
    ],
    [
      "þicce",
      "þicce#Old_English"
    ],
    [
      "*þikkwī",
      "Reconstruction:Proto-West Germanic/þikkwī"
    ],
    [
      "*þekuz",
      "Reconstruction:Proto-Germanic/þekuz"
    ],
    [
      "*tégus",
      "Reconstruction:Proto-Indo-European/tégus"
    ],
    [
      "sjok",
      "sjok#North_Frisian"
    ],
    [
      "tjok",
      "tjok#North_Frisian"
    ],
    [
      "tjuk",
      "tjuk#North_Frisian"
    ],
    [
      "tschok",
      "tschok#North_Frisian"
    ],
    [
      "tjuk",
      "tjuk#Saterland_Frisian"
    ],
    [
      "dik",
      "dik#West_Frisian"
    ],
    [
      "tuuk",
      "tuuk#West_Frisian"
    ],
    [
      "deck",
      "deck#Central_Franconian"
    ],
    [
      "dikh",
      "dikh#Cimbrian"
    ],
    [
      "dikhe",
      "dikhe#Cimbrian"
    ],
    [
      "dik",
      "dik#Dutch"
    ],
    [
      "dick",
      "dick#German"
    ],
    [
      "déck",
      "déck#Luxembourgish"
    ],
    [
      "דיק",
      "דיק#Yiddish"
    ],
    [
      "tyk",
      "tyk#Danish"
    ],
    [
      "tiokk",
      "tiokk#Elfdalian"
    ],
    [
      "tjúkkur",
      "tjúkkur#Faroese"
    ],
    [
      "þykkur",
      "þykkur#Icelandic"
    ],
    [
      "Norwegian Bokmål",
      "tjukk#Norwegian_Bokmål"
    ],
    [
      "tjukk",
      "tjukk#Norwegian_Nynorsk"
    ],
    [
      "tykk",
      "tykk#Norwegian_Nynorsk"
    ],
    [
      "tjykker",
      "tjykker#Scanian"
    ],
    [
      "tjock",
      "tjock#Swedish"
    ],
    [
      "Cornish",
      "tew#Cornish"
    ],
    [
      "tew",
      "tew#Welsh"
    ],
    [
      "tiubh",
      "tiubh#Irish"
    ],
    [
      "tiugh",
      "tiugh#Irish"
    ],
    [
      "çhiu",
      "çhiu#Manx"
    ],
    [
      "tiugh",
      "tiugh#Scottish_Gaelic"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
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      "pos": "det",
      "glosses": [
        "Alternative form of thilk (“that same”)."
      ],
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        "alternative"
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    {
      "pos": "noun",
      "glosses": [
        "The thickest, or most active or intense, part of something.",
        "A thicket.",
        "A stupid person; a fool."
      ],
      "tags": [
        "slang"
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      "pos": "adv",
      "glosses": [
        "In a thick manner.",
        "Frequently or numerously."
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      "pos": "adj",
      "glosses": [
        "Relatively great in extent from one surface to the opposite in its smallest solid dimension.",
        "Measuring a certain number of units in this dimension.",
        "Heavy in build; thickset.",
        "Densely crowded or packed."
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      "pos": "verb",
      "glosses": [
        "To thicken."
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        "archaic"
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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.

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Contribute located evidence for thick →

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-dGhpY2s