*SET-U

English word origin

Etymology of index

Etymology tree Proto-Indo-European *h₁én Proto-Italic *en Old Latin en Latin in Proto-Indo-European *deyḱ- Proto-Indo-European *-eti Proto-Indo-European *déyḱeti Proto-Italic *deikō Latin dīcō Proto-Indo-European *-s Lat

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 ↗
noun

An alphabetical listing of items and their location. · The index finger; the forefinger. · A movable finger on a gauge, scale, etc. · A symbol resembling a pointing hand, used to direct particular attention to a note or paragraph.

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

Etymology tree Proto-Indo-European *h₁én Proto-Italic *en Old Latin en Latin in Proto-Indo-European *deyḱ- Proto-Indo-European *-eti Proto-Indo-European *déyḱeti Proto-Italic *deikō Latin dīcō Proto-Indo-European *-s Latin -s Latin indexder. English index From Latin index (“a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription”), from indicō (“point out, show”); see indicate.

Relationships mentioned by the source

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

  • Root classification mention*deyḱ-ine-pro
  • Derivation mentionindexla · a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription

This page abbreviates 10 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": ":der",
        "3": "la:index",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₁én\nProto-Italic *en\nOld Latin en\nLatin in\nProto-Indo-European *deyḱ-\nProto-Indo-European *-eti\nProto-Indo-European *déyḱeti\nProto-Italic *deikō\nLatin dīcō\nProto-Indo-European *-s\nLatin -s\nLatin indexder.\nEnglish index\n[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"in\", \"children\" : [ { \"terms\" : [ { \"id\" : \"in\", \"children\" : [ { \"terms\" : [ { \"id\" : \"in\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₁én\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*en\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Old Latin\", \"term\" : \"en\", \"lang\" : \"itc-ola\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Latin\", \"term\" : \"in\", \"status\" : \"ok\", \"lang\" : \"la\" }, { \"id\" : \"to speak\", \"children\" : [ { \"terms\" : [ { \"id\" : \"to show\", \"children\" : [ { \"terms\" : [ { \"id\" : \"to be pointing out\", \"children\" : [ { \"terms\" : [ { \"id\" : \"to point out\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*deyḱ-\", \"lang\" : \"ine-pro\" }, { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-eti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*déyḱeti\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*deikō\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"dīcō\", \"gloss\" : \"to say, indicate\", \"lang\" : \"la\" }, { \"children\" : [ { \"terms\" : [ { \"id\" : \"amphikinetic\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-s\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"-s\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"Latin\", \"term\" : \"index\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"English\", \"term\" : \"index\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"index\">"
    },
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    },
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      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "index",
        "t": "a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription"
      },
      "expansion": "Latin index (“a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription”)"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":der",
        "3": "la:index",
        "tree": "1"
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      "expansion": "Etymology tree\nProto-Indo-European *h₁én\nProto-Italic *en\nOld Latin en\nLatin in\nProto-Indo-European *deyḱ-\nProto-Indo-European *-eti\nProto-Indo-European *déyḱeti\nProto-Italic *deikō\nLatin dīcō\nProto-Indo-European *-s\nLatin -s\nLatin indexder.\nEnglish index"
    }
  ],
  "links": [
    [
      "*h₁én",
      "Reconstruction:Proto-Indo-European/h₁én#Proto-Indo-European:_in"
    ],
    [
      "*en",
      "Reconstruction:Proto-Italic/en#Proto-Italic:_in"
    ],
    [
      "en",
      "en#Latin:_in"
    ],
    [
      "in",
      "in#Latin"
    ],
    [
      "*deyḱ-",
      "Reconstruction:Proto-Indo-European/deyḱ-#Proto-Indo-European:_to_point_out"
    ],
    [
      "*-eti",
      "Reconstruction:Proto-Indo-European/-eti"
    ],
    [
      "*déyḱeti",
      "Reconstruction:Proto-Indo-European/déyḱeti#Proto-Indo-European:_to_be_pointing_out"
    ],
    [
      "*deikō",
      "Reconstruction:Proto-Italic/deikō#Proto-Italic:_to_show"
    ],
    [
      "dīcō",
      "dico#Latin:_to_speak"
    ],
    [
      "*-s",
      "Reconstruction:Proto-Indo-European/-s#Proto-Indo-European:_amphikinetic"
    ],
    [
      "-s",
      "-s#Latin"
    ],
    [
      "index",
      "index#Latin"
    ],
    [
      "index",
      "index#Latin"
    ],
    [
      "indicō",
      "indico#Latin"
    ],
    [
      "indicate",
      "indicate#English"
    ]
  ],
  "references": [],
  "descendants": [
    {
      "lang": "Chinese",
      "lang_code": "zh",
      "word": "引得",
      "raw_tags": [
        "reshaped by analogy or addition of morphemes"
      ],
      "roman": "yǐndé"
    },
    {
      "lang": "Japanese",
      "lang_code": "ja",
      "word": "インデックス",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "indekkusu"
    }
  ],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "An alphabetical listing of items and their location.",
        "The index finger; the forefinger.",
        "A movable finger on a gauge, scale, etc.",
        "A symbol resembling a pointing hand, used to direct particular attention to a note or paragraph."
      ],
      "tags": [],
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    }
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  "omittedAuxiliaryFields": {
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    "lexicalRecords": 0,
    "lexicalSenses": 10,
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  }
}

Unnumbered source etymology · variant 2/2

Original entry ↗
verb

To arrange an index for something, especially a long text. · To inventory; to take stock. · To normalise in order to account for inflation; to correct for inflation by linking to a price index in order to maintain real levels. · To measure by an associated value.

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

Etymology tree Proto-Indo-European *h₁én Proto-Italic *en Old Latin en Latin in Proto-Indo-European *deyḱ- Proto-Indo-European *-eti Proto-Indo-European *déyḱeti Proto-Italic *deikō Latin dīcō Proto-Indo-European *-s Latin -s Latin indexder. English index From Latin index (“a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription”), from indicō (“point out, show”); see indicate.

Relationships mentioned by the source

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

  • Root classification mention*deyḱ-ine-pro
  • Derivation mentionindexla · a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription

This page abbreviates 3 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": ":der",
        "3": "la:index",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₁én\nProto-Italic *en\nOld Latin en\nLatin in\nProto-Indo-European *deyḱ-\nProto-Indo-European *-eti\nProto-Indo-European *déyḱeti\nProto-Italic *deikō\nLatin dīcō\nProto-Indo-European *-s\nLatin -s\nLatin indexder.\nEnglish index\n[Appendix:Glossary#derived_terms|Derived]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"id\" : \"in\", \"children\" : [ { \"terms\" : [ { \"id\" : \"in\", \"children\" : [ { \"terms\" : [ { \"id\" : \"in\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₁én\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*en\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Old Latin\", \"term\" : \"en\", \"lang\" : \"itc-ola\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Latin\", \"term\" : \"in\", \"status\" : \"ok\", \"lang\" : \"la\" }, { \"id\" : \"to speak\", \"children\" : [ { \"terms\" : [ { \"id\" : \"to show\", \"children\" : [ { \"terms\" : [ { \"id\" : \"to be pointing out\", \"children\" : [ { \"terms\" : [ { \"id\" : \"to point out\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*deyḱ-\", \"lang\" : \"ine-pro\" }, { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-eti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*déyḱeti\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*deikō\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"dīcō\", \"gloss\" : \"to say, indicate\", \"lang\" : \"la\" }, { \"children\" : [ { \"terms\" : [ { \"id\" : \"amphikinetic\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-s\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"-s\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"Latin\", \"term\" : \"index\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"English\", \"term\" : \"index\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"index\">"
    },
    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*deyḱ-"
      },
      "expansion": ""
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "index",
        "t": "a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription"
      },
      "expansion": "Latin index (“a discoverer, informer, spy; of things, an indicator, the forefinger, a title, superscription”)"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":der",
        "3": "la:index",
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    }
  ],
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    [
      "*h₁én",
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    ],
    [
      "*en",
      "Reconstruction:Proto-Italic/en#Proto-Italic:_in"
    ],
    [
      "en",
      "en#Latin:_in"
    ],
    [
      "in",
      "in#Latin"
    ],
    [
      "*deyḱ-",
      "Reconstruction:Proto-Indo-European/deyḱ-#Proto-Indo-European:_to_point_out"
    ],
    [
      "*-eti",
      "Reconstruction:Proto-Indo-European/-eti"
    ],
    [
      "*déyḱeti",
      "Reconstruction:Proto-Indo-European/déyḱeti#Proto-Indo-European:_to_be_pointing_out"
    ],
    [
      "*deikō",
      "Reconstruction:Proto-Italic/deikō#Proto-Italic:_to_show"
    ],
    [
      "dīcō",
      "dico#Latin:_to_speak"
    ],
    [
      "*-s",
      "Reconstruction:Proto-Indo-European/-s#Proto-Indo-European:_amphikinetic"
    ],
    [
      "-s",
      "-s#Latin"
    ],
    [
      "index",
      "index#Latin"
    ],
    [
      "index",
      "index#Latin"
    ],
    [
      "indicō",
      "indico#Latin"
    ],
    [
      "indicate",
      "indicate#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To arrange an index for something, especially a long text.",
        "To inventory; to take stock.",
        "To normalise in order to account for inflation; to correct for inflation by linking to a price index in order to maintain real levels.",
        "To measure by an associated value."
      ],
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        "transitive"
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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 index →

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-aW5kZXg