*SET-U

English word origin

Etymology of arc

Etymology tree Proto-Indo-European *h₂erkʷ- Proto-Indo-European *h₂erkʷos Proto-Italic *arkuos Latin arcus Old French arcbor. Middle English ark English arc Inherited from Middle English ark, from Old French arc, from La

2 source sectionsExtended source reportWiktionary original ↗
In this entry · 2 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 · variant 1/2

Original entry ↗
verb

To move following a curved path. · To shape into an arc; to hold in the form of an arc. · To form an electrical arc.

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

Etymology tree Proto-Indo-European *h₂erkʷ- Proto-Indo-European *h₂erkʷos Proto-Italic *arkuos Latin arcus Old French arcbor. Middle English ark English arc Inherited from Middle English ark, from Old French arc, from Latin arcus (“a bow, arc, arch”), ultimately from Proto-Indo-European *h₂erkʷos (“bow, arrow”). Doublet of arch, arco, and arrow.

Relationships mentioned by the source

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

  • Inherited-form mentionarkenm
  • Derivation mentionarcfro
  • Derivation mentionarcusla · a bow, arc, arch
  • Derivation mention*h₂erkʷosine-pro
  • Doublet mentionarchen
  • Doublet mentionarcoen
  • Doublet mentionarrowen
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:ark",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂erkʷ-\nProto-Indo-European *h₂erkʷos\nProto-Italic *arkuos\nLatin arcus\nOld French arcbor.\nMiddle English ark\nEnglish arc\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂erkʷ-\", \"status\" : \"missing\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂erkʷos\", \"status\" : \"inline\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*arkuos\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"arcus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old French\", \"term\" : \"arc\", \"status\" : \"ok\", \"lang\" : \"fro\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"ark\", \"status\" : \"ok\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"English\", \"term\" : \"arc\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"arc\">"
    },
    {
      "name": "yesno",
      "args": {
        "1": "",
        "2": "i",
        "3": "I"
      },
      "expansion": "I"
    },
    {
      "name": "glossary",
      "args": {
        "1": "Inherited"
      },
      "expansion": "Inherited"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "ark",
        "4": "",
        "5": "",
        "lit": "",
        "pos": "",
        "tr": "",
        "ts": "",
        "id": "",
        "sc": "",
        "g": "",
        "g2": "",
        "g3": "",
        "nocat": "",
        "sort": ""
      },
      "expansion": "Middle English ark"
    },
    {
      "name": "inh+",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "ark"
      },
      "expansion": "Inherited from Middle English ark"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "arc"
      },
      "expansion": "Old French arc"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "arcus",
        "t": "a bow, arc, arch"
      },
      "expansion": "Latin arcus (“a bow, arc, arch”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*h₂erkʷos",
        "4": "",
        "5": "bow, arrow"
      },
      "expansion": "Proto-Indo-European *h₂erkʷos (“bow, arrow”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "arch",
        "3": "arco",
        "4": "arrow"
      },
      "expansion": "Doublet of arch, arco, and arrow"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:ark",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂erkʷ-\nProto-Indo-European *h₂erkʷos\nProto-Italic *arkuos\nLatin arcus\nOld French arcbor.\nMiddle English ark\nEnglish arc"
    }
  ],
  "links": [
    [
      "*h₂erkʷ-",
      "Reconstruction:Proto-Indo-European/h₂erkʷ-"
    ],
    [
      "*h₂erkʷos",
      "Reconstruction:Proto-Indo-European/h₂erkʷos"
    ],
    [
      "*arkuos",
      "Reconstruction:Proto-Italic/arkuos"
    ],
    [
      "arcus",
      "arcus#Latin"
    ],
    [
      "arc",
      "arc#Old_French"
    ],
    [
      "ark",
      "ark#Middle_English"
    ],
    [
      "ark",
      "ark#Middle_English"
    ],
    [
      "arc",
      "arc#Old_French"
    ],
    [
      "arcus",
      "arcus#Latin"
    ],
    [
      "*h₂erkʷos",
      "Reconstruction:Proto-Indo-European/h₂erkʷos"
    ],
    [
      "bow",
      "bow"
    ],
    [
      "arrow",
      "arrow"
    ],
    [
      "arch",
      "arch#English"
    ],
    [
      "arco",
      "arco#English"
    ],
    [
      "arrow",
      "arrow#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To move following a curved path.",
        "To shape into an arc; to hold in the form of an arc.",
        "To form an electrical arc."
      ],
      "tags": [
        "ambitransitive",
        "transitive",
        "intransitive"
      ],
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  "omittedAuxiliaryFields": {
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    "lexicalRecords": 0,
    "lexicalSenses": 0,
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  }
}

Unnumbered source etymology · variant 2/2

Original entry ↗
noun

That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon. · A continuous part of the circumference of a circle (circular arc) or of another curve. · A curve, in general. · A band contained within parallel curves, or something of that shape.

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

Etymology tree Proto-Indo-European *h₂erkʷ- Proto-Indo-European *h₂erkʷos Proto-Italic *arkuos Latin arcus Old French arcbor. Middle English ark English arc Inherited from Middle English ark, from Old French arc, from Latin arcus (“a bow, arc, arch”), ultimately from Proto-Indo-European *h₂erkʷos (“bow, arrow”). Doublet of arch, arco, and arrow.

Relationships mentioned by the source

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

  • Inherited-form mentionarkenm
  • Derivation mentionarcfro
  • Derivation mentionarcusla · a bow, arc, arch
  • Derivation mention*h₂erkʷosine-pro
  • Doublet mentionarchen
  • Doublet mentionarcoen
  • Doublet mentionarrowen

This page abbreviates 7 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": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:ark",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂erkʷ-\nProto-Indo-European *h₂erkʷos\nProto-Italic *arkuos\nLatin arcus\nOld French arcbor.\nMiddle English ark\nEnglish arc\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂erkʷ-\", \"status\" : \"missing\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂erkʷos\", \"status\" : \"inline\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*arkuos\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"arcus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old French\", \"term\" : \"arc\", \"status\" : \"ok\", \"lang\" : \"fro\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Middle English\", \"term\" : \"ark\", \"status\" : \"ok\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"English\", \"term\" : \"arc\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"arc\">"
    },
    {
      "name": "yesno",
      "args": {
        "1": "",
        "2": "i",
        "3": "I"
      },
      "expansion": "I"
    },
    {
      "name": "glossary",
      "args": {
        "1": "Inherited"
      },
      "expansion": "Inherited"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "ark",
        "4": "",
        "5": "",
        "lit": "",
        "pos": "",
        "tr": "",
        "ts": "",
        "id": "",
        "sc": "",
        "g": "",
        "g2": "",
        "g3": "",
        "nocat": "",
        "sort": ""
      },
      "expansion": "Middle English ark"
    },
    {
      "name": "inh+",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "ark"
      },
      "expansion": "Inherited from Middle English ark"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "arc"
      },
      "expansion": "Old French arc"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "arcus",
        "t": "a bow, arc, arch"
      },
      "expansion": "Latin arcus (“a bow, arc, arch”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*h₂erkʷos",
        "4": "",
        "5": "bow, arrow"
      },
      "expansion": "Proto-Indo-European *h₂erkʷos (“bow, arrow”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "arch",
        "3": "arco",
        "4": "arrow"
      },
      "expansion": "Doublet of arch, arco, and arrow"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":inh",
        "3": "enm:ark",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂erkʷ-\nProto-Indo-European *h₂erkʷos\nProto-Italic *arkuos\nLatin arcus\nOld French arcbor.\nMiddle English ark\nEnglish arc"
    }
  ],
  "links": [
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      "Reconstruction:Proto-Indo-European/h₂erkʷ-"
    ],
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      "*h₂erkʷos",
      "Reconstruction:Proto-Indo-European/h₂erkʷos"
    ],
    [
      "*arkuos",
      "Reconstruction:Proto-Italic/arkuos"
    ],
    [
      "arcus",
      "arcus#Latin"
    ],
    [
      "arc",
      "arc#Old_French"
    ],
    [
      "ark",
      "ark#Middle_English"
    ],
    [
      "ark",
      "ark#Middle_English"
    ],
    [
      "arc",
      "arc#Old_French"
    ],
    [
      "arcus",
      "arcus#Latin"
    ],
    [
      "*h₂erkʷos",
      "Reconstruction:Proto-Indo-European/h₂erkʷos"
    ],
    [
      "bow",
      "bow"
    ],
    [
      "arrow",
      "arrow"
    ],
    [
      "arch",
      "arch#English"
    ],
    [
      "arco",
      "arco#English"
    ],
    [
      "arrow",
      "arrow#English"
    ]
  ],
  "references": [],
  "descendants": [
    {
      "lang": "Irish",
      "lang_code": "ga",
      "word": "arc",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "Maltese",
      "lang_code": "mt",
      "word": "ark",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "Welsh",
      "lang_code": "cy",
      "word": "arc",
      "raw_tags": [
        "borrowed"
      ]
    }
  ],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.",
        "A continuous part of the circumference of a circle (circular arc) or of another curve.",
        "A curve, in general.",
        "A band contained within parallel curves, or something of that shape."
      ],
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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 arc →

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-YXJj