*SET-U

English word origin

Etymology of cog

Etymology tree Proto-Indo-European *gēw- Proto-Indo-European *gugāder. Proto-Germanic *kuggōder. Old Norse *koggrbor. Middle English cogge English cog Inherited from Middle English cogge, from Old Norse *kogge, *koggr (s

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 furnish with a cog or cogs. · Of an electric motor or generator, to snap preferentially to certain positions when not energized.

noun

A tooth on a gear. · A gear; especially, a cogwheel. · An unimportant individual in a greater system. · A projection or tenon at the end of a beam designed to fit into a matching opening of another piece of wood to form a joint.

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

Etymology tree Proto-Indo-European *gēw- Proto-Indo-European *gugāder. Proto-Germanic *kuggōder. Old Norse *koggrbor. Middle English cogge English cog Inherited from Middle English cogge, from Old Norse *kogge, *koggr (see Old Swedish kogge, kogger), from Proto-Germanic *kuggō (“cog, swelling”), from Proto-Indo-European *gugā (“hump, ball”), from *gēw- (“to bend, arch”). Compare Lithuanian gugà (“pommel, hump, hill”). Cognates includes: Swedish kugg, kugge (“cog tooth”), Norwegian kugg (“cog”). The meaning of “cog” in carpentry derives from association with a tooth on a cogwheel. Compare Old Swedish koggavidher (“cog wood”), “wood reserved for a millwheel”. See also dialectal English cag (“stump”), keg; Old Norse kaggi (“keg”) + -gi (diminutive suffix), from the Germanic base *kagô (“bush, branch, stalk, stump”); also found in Bavarian Kag (“the stalk or stem of a cabbage”); dialectal Swedish kage (“treestump; piece of wood; post”), kagg or kagge (“scythe handle”); Norwegian Nynorsk kage or kagge (“low lying bush, small tree”), dialectal kagg (“scythe handle”); Old English ċeacga (“broom, furze, gorse”), whence English chag (“branch”), also Old English cyċġel, English cudgel (“knotty club”). The ultimate origin could be related to English cog (“cargo boat”) (Dutch kogge), probably named for its “round swollen” appearance.

Relationships mentioned by the source

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

  • Inherited-form mentioncoggeenm
  • Derivation mention*koggrnon
  • Cognate mentionkoggergmq-osw
  • Derivation mention*kuggōgem-pro
  • Derivation mention*gugāine-pro
  • Cognate mentiongugàlt
  • Cognate mentionkuggsv
  • Cognate mentionkuggno
  • Cognate mentionkoggavidhergmq-osw
  • Cognate mentioncagen
  • Cognate mentionkagginon
  • Cognate mentionKagbar · the stalk or stem of a cabbage
  • Cognate mentionkagesv · treestump; piece of wood; post
  • Cognate mentionkagenn
  • Cognate mentionċeacgaang · broom, furze, gorse
  • Cognate mentionchagen · branch
  • Cognate mentioncycgelang
  • Cognate mentioncudgelen
  • Cognate mentioncogen
  • Cognate mentionkoggenl

This page abbreviates 1 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.

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      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:cogge<ety:bor<non:*koggr<ety:der<gem-pro:*kuggō<ety:der<ine-pro:*gugā<ety:from<*gēw->>>>>>>>",
        "id": "tooth",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *gēw-\nProto-Indo-European *gugāder.\nProto-Germanic *kuggōder.\nOld Norse *koggrbor.\nMiddle English cogge\nEnglish cog\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*gēw-\", \"status\" : \"missing\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*gugā\", \"status\" : \"inline\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Germanic\", \"term\" : \"*kuggō\", \"status\" : \"inline\", \"lang\" : \"gem-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Old Norse\", \"term\" : \"*koggr\", \"status\" : \"inline\", \"lang\" : \"non\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"cogge\", \"status\" : \"inline\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"English\", \"term\" : \"cog\", \"lang\" : \"en\" }\" data-id=\"tooth\" data-lang=\"en\" data-title=\"cog\" id=\"English:_tooth\">"
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      "name": "glossary",
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      },
      "expansion": "Inherited"
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      "name": "inh",
      "args": {
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        "4": "",
        "5": "",
        "lit": "",
        "pos": "",
        "tr": "",
        "ts": "",
        "id": "",
        "sc": "",
        "g": "",
        "g2": "",
        "g3": "",
        "nocat": "",
        "sort": ""
      },
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      "name": "inh+",
      "args": {
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      },
      "expansion": "Inherited from Middle English cogge"
    },
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      "name": "der",
      "args": {
        "1": "en",
        "2": "non",
        "3": "*koggr",
        "4": "*kogge, *koggr"
      },
      "expansion": "Old Norse *kogge, *koggr"
    },
    {
      "name": "cog",
      "args": {
        "1": "gmq-osw",
        "2": "kogger",
        "3": "kogge, kogger"
      },
      "expansion": "Old Swedish kogge, kogger"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*kuggō",
        "4": "",
        "5": "cog, swelling"
      },
      "expansion": "Proto-Germanic *kuggō (“cog, swelling”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*gugā",
        "4": "",
        "5": "hump, ball"
      },
      "expansion": "Proto-Indo-European *gugā (“hump, ball”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "lt",
        "2": "gugà",
        "3": "",
        "4": "pommel, hump, hill"
      },
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    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "kugg",
        "3": "kugg, kugge",
        "4": "cog tooth"
      },
      "expansion": "Swedish kugg, kugge (“cog tooth”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "no",
        "2": "kugg",
        "3": "",
        "4": "cog"
      },
      "expansion": "Norwegian kugg (“cog”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "gmq-osw",
        "2": "koggavidher",
        "3": "",
        "4": "cog wood"
      },
      "expansion": "Old Swedish koggavidher (“cog wood”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "en",
        "2": "cag",
        "3": "",
        "4": "stump"
      },
      "expansion": "English cag (“stump”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "non",
        "2": "kaggi",
        "3": "",
        "4": "keg"
      },
      "expansion": "Old Norse kaggi (“keg”)"
    },
    {
      "name": "suf",
      "args": {
        "1": "non",
        "2": "",
        "3": "-gi",
        "pos2": "diminutive suffix",
        "nocat": "1"
      },
      "expansion": "+ -gi (diminutive suffix)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem",
        "3": "-"
      },
      "expansion": "Germanic"
    },
    {
      "name": "cog",
      "args": {
        "1": "bar",
        "2": "Kag",
        "t": "the stalk or stem of a cabbage"
      },
      "expansion": "Bavarian Kag (“the stalk or stem of a cabbage”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "kage",
        "t": "treestump; piece of wood; post"
      },
      "expansion": "Swedish kage (“treestump; piece of wood; post”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nn",
        "2": "kage"
      },
      "expansion": "Norwegian Nynorsk kage"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "ċeacga",
        "t": "broom, furze, gorse"
      },
      "expansion": "Old English ċeacga (“broom, furze, gorse”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "en",
        "2": "chag",
        "t": "branch"
      },
      "expansion": "English chag (“branch”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "cycgel",
        "3": "cyċġel"
      },
      "expansion": "Old English cyċġel"
    },
    {
      "name": "cog",
      "args": {
        "1": "en",
        "2": "cudgel",
        "3": "",
        "4": "knotty club"
      },
      "expansion": "English cudgel (“knotty club”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "en",
        "2": "cog",
        "3": "",
        "4": "cargo boat",
        "id": "ship"
      },
      "expansion": "English cog (“cargo boat”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "kogge"
      },
      "expansion": "Dutch kogge"
    },
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      "name": "etymon",
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        "1": "en",
        "2": ":inh",
        "3": "enm:cogge<ety:bor<non:*koggr<ety:der<gem-pro:*kuggō<ety:der<ine-pro:*gugā<ety:from<*gēw->>>>>>>>",
        "id": "tooth",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *gēw-\nProto-Indo-European *gugāder.\nProto-Germanic *kuggōder.\nOld Norse *koggrbor.\nMiddle English cogge\nEnglish cog"
    }
  ],
  "links": [
    [
      "*gēw-",
      "Reconstruction:Proto-Indo-European/gēw-"
    ],
    [
      "*gugā",
      "Reconstruction:Proto-Indo-European/gugā"
    ],
    [
      "*kuggō",
      "Reconstruction:Proto-Germanic/kuggō"
    ],
    [
      "*koggr",
      "Reconstruction:Old Norse/koggr"
    ],
    [
      "cogge",
      "cogge#Middle_English"
    ],
    [
      "cogge",
      "cogge#Middle_English"
    ],
    [
      "*kogge, *koggr",
      "Reconstruction:Old Norse/koggr"
    ],
    [
      "kogge, kogger",
      "kogger#Old_Swedish"
    ],
    [
      "*kuggō",
      "Reconstruction:Proto-Germanic/kuggō"
    ],
    [
      "*gugā",
      "Reconstruction:Proto-Indo-European/gugā"
    ],
    [
      "*gēw-",
      "Reconstruction:Proto-Indo-European/gēw-"
    ],
    [
      "gugà",
      "guga#Lithuanian"
    ],
    [
      "kugg, kugge",
      "kugg#Swedish"
    ],
    [
      "kugg",
      "kugg#Norwegian"
    ],
    [
      "koggavidher",
      "koggavidher#Old_Swedish"
    ],
    [
      "cag",
      "cag#English"
    ],
    [
      "keg",
      "keg#English"
    ],
    [
      "kaggi",
      "kaggi#Old_Norse"
    ],
    [
      "-gi",
      "-gi#Old_Norse"
    ],
    [
      "*kagô",
      "Reconstruction:Proto-Germanic/kagô"
    ],
    [
      "Kag",
      "Kag#Bavarian"
    ],
    [
      "kage",
      "kage#Swedish"
    ],
    [
      "kagg",
      "kagg#Swedish"
    ],
    [
      "kagge",
      "kagge#Swedish"
    ],
    [
      "kage",
      "kage#Norwegian_Nynorsk"
    ],
    [
      "kagge",
      "kagge#Norwegian"
    ],
    [
      "kagg",
      "kagg#Norwegian"
    ],
    [
      "ċeacga",
      "ceacga#Old_English"
    ],
    [
      "chag",
      "chag#English"
    ],
    [
      "cyċġel",
      "cycgel#Old_English"
    ],
    [
      "cudgel",
      "cudgel#English"
    ],
    [
      "cog",
      "cog#English:_ship"
    ],
    [
      "kogge",
      "kogge#Dutch"
    ]
  ],
  "references": [],
  "descendants": [],
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      "pos": "verb",
      "glosses": [
        "To furnish with a cog or cogs.",
        "Of an electric motor or generator, to snap preferentially to certain positions when not energized."
      ],
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        "A tooth on a gear.",
        "A gear; especially, a cogwheel.",
        "An unimportant individual in a greater system.",
        "A projection or tenon at the end of a beam designed to fit into a matching opening of another piece of wood to form a joint."
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Source etymology 2

Original entry ↗
noun

A partially clinker-built, flat-bottomed, square-rigged mediaeval ship of burden or war, with a round, bulky hull and a single mast, typically 15 to 25 meters in length, in use from ca. 1150 to 1500. · The hypothetical precursor ship type of the above said to be in use during the early Middle Ages, variously alleged to be Frisian or Scandinavian. · A small fishing boat.

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

From Middle English cogge, from Middle Dutch kogge, cogghe (modern kogge), from Proto-Germanic *kuggō, from Proto-Indo-European *gugā (“hump, ball”) (compare Lithuanian gugà (“pommel, hump, hill”)), from *gēw- (“to bend, arch”). See etymology 1 above.

Relationships mentioned by the source

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

  • Inherited-form mentioncoggeenm
  • Derivation mentionkoggedum
  • Derivation mention*kuggōgem-pro
  • Derivation mention*gugāine-pro
  • Cognate mentiongugàlt
Inspect preserved source fields

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

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        "1": "+ (ship)"
      },
      "expansion": ""
    },
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Source etymology 3

Original entry ↗
verb

To load (a die) so that it can be used to cheat. · To cheat; to play or gamble fraudulently. · To seduce, or draw away, by adulation, artifice, or falsehood; to wheedle; to cozen; to cheat. · To plagiarize.

noun

A trick or deception; a falsehood.

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

Uncertain. Both verb and noun appear first in 1532.

This page abbreviates 1 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.

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        "To load (a die) so that it can be used to cheat.",
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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 cog →

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-Y29n