*SET-U

English word origin

Etymology of acid

Etymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-éh₁ti Proto-Indo-European *-yeti Proto-Indo-European *-éh₁yeti Proto-Indo-European *h₂eḱéh₁yeti Proto-Italic *akēō Latin aceō Proto-Indo-European *dʰeh₁-der

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

A sour substance. · Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid. · Any compound that easily donates protons to a base; a Brønsted acid. · Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid.

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

Etymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-éh₁ti Proto-Indo-European *-yeti Proto-Indo-European *-éh₁yeti Proto-Indo-European *h₂eḱéh₁yeti Proto-Italic *akēō Latin aceō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin aciduslbor. French acidebor. English acid From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.

Relationships mentioned by the source

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

This page abbreviates 2 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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  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":bor",
        "3": "fr:acide",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂eḱ-\nProto-Indo-European *-éh₁ti\nProto-Indo-European *-yeti\nProto-Indo-European *-éh₁yeti\nProto-Indo-European *h₂eḱéh₁yeti\nProto-Italic *akēō\nLatin aceō\nProto-Indo-European *dʰeh₁-der.\nProto-Italic *-iðos\nLatin -idus\nLatin aciduslbor.\nFrench acidebor.\nEnglish acid\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"lbor.\", \"keyword_label\" : \"Learned borrowing from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"gloss\" : \"to be sour\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"alt\" : \"*h₂eḱéh₁yeti\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"id\" : \"sharp\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂eḱ-\", \"lang\" : \"ine-pro\" }, { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-éh₁ti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" }, { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-yeti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-éh₁yeti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*akēō\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"aceō\", \"status\" : \"ok\", \"lang\" : \"la\" }, { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"id\" : \"do\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dʰeh₁-\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*-iðos\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"-idus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"Latin\", \"term\" : \"acidus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"lbor\" } ], \"lang_name\" : \"French\", \"term\" : \"acide\", \"status\" : \"ok\", \"lang\" : \"fr\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"English\", \"term\" : \"acid\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"acid\">"
    },
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      "name": "bor",
      "args": {
        "1": "en",
        "2": "fr",
        "3": "acide"
      },
      "expansion": "French acide"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "acidus",
        "4": "",
        "5": "sour, acid"
      },
      "expansion": "Latin acidus (“sour, acid”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "agita"
      },
      "expansion": "Doublet of agita"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":bor",
        "3": "fr:acide",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂eḱ-\nProto-Indo-European *-éh₁ti\nProto-Indo-European *-yeti\nProto-Indo-European *-éh₁yeti\nProto-Indo-European *h₂eḱéh₁yeti\nProto-Italic *akēō\nLatin aceō\nProto-Indo-European *dʰeh₁-der.\nProto-Italic *-iðos\nLatin -idus\nLatin aciduslbor.\nFrench acidebor.\nEnglish acid"
    }
  ],
  "links": [
    [
      "*h₂eḱ-",
      "Reconstruction:Proto-Indo-European/h₂eḱ-#Proto-Indo-European:_sharp"
    ],
    [
      "*-éh₁ti",
      "Reconstruction:Proto-Indo-European/-éh₁ti"
    ],
    [
      "*-yeti",
      "Reconstruction:Proto-Indo-European/-yeti"
    ],
    [
      "*-éh₁yeti",
      "Reconstruction:Proto-Indo-European/-éh₁yeti"
    ],
    [
      "*akēō",
      "Reconstruction:Proto-Italic/akēō"
    ],
    [
      "aceō",
      "aceo#Latin"
    ],
    [
      "*dʰeh₁-",
      "Reconstruction:Proto-Indo-European/dʰeh₁-#Proto-Indo-European:_do"
    ],
    [
      "*-iðos",
      "Reconstruction:Proto-Italic/-iðos"
    ],
    [
      "-idus",
      "-idus#Latin"
    ],
    [
      "acidus",
      "acidus#Latin"
    ],
    [
      "acide",
      "acide#French"
    ],
    [
      "acide",
      "acide#French"
    ],
    [
      "acidus",
      "acidus#Latin"
    ],
    [
      "aceō",
      "aceo#Latin"
    ],
    [
      "agita",
      "agita#English"
    ]
  ],
  "references": [],
  "descendants": [
    {
      "lang": "Welsh",
      "lang_code": "cy",
      "word": "asid",
      "raw_tags": [
        "borrowed"
      ]
    }
  ],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A sour substance.",
        "Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid.",
        "Any compound that easily donates protons to a base; a Brønsted acid.",
        "Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid."
      ],
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}

Unnumbered source etymology · variant 2/2

Original entry ↗
adj

Sour, sharp, or biting to the taste; tart; having the taste of vinegar. · Sour-tempered. · Of or pertaining to an acid; acidic. · Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.

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

Etymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-éh₁ti Proto-Indo-European *-yeti Proto-Indo-European *-éh₁yeti Proto-Indo-European *h₂eḱéh₁yeti Proto-Italic *akēō Latin aceō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin aciduslbor. French acidebor. English acid From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.

Relationships mentioned by the source

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

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":bor",
        "3": "fr:acide",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂eḱ-\nProto-Indo-European *-éh₁ti\nProto-Indo-European *-yeti\nProto-Indo-European *-éh₁yeti\nProto-Indo-European *h₂eḱéh₁yeti\nProto-Italic *akēō\nLatin aceō\nProto-Indo-European *dʰeh₁-der.\nProto-Italic *-iðos\nLatin -idus\nLatin aciduslbor.\nFrench acidebor.\nEnglish acid\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"lbor.\", \"keyword_label\" : \"Learned borrowing from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"gloss\" : \"to be sour\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"alt\" : \"*h₂eḱéh₁yeti\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"id\" : \"sharp\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂eḱ-\", \"lang\" : \"ine-pro\" }, { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-éh₁ti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" }, { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-yeti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-éh₁yeti\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*akēō\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"aceō\", \"status\" : \"ok\", \"lang\" : \"la\" }, { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"id\" : \"do\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*dʰeh₁-\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*-iðos\", \"status\" : \"inline\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Latin\", \"term\" : \"-idus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"Latin\", \"term\" : \"acidus\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"lbor\" } ], \"lang_name\" : \"French\", \"term\" : \"acide\", \"status\" : \"ok\", \"lang\" : \"fr\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"English\", \"term\" : \"acid\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"acid\">"
    },
    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*h₂eḱ-"
      },
      "expansion": ""
    },
    {
      "name": "bor",
      "args": {
        "1": "en",
        "2": "fr",
        "3": "acide"
      },
      "expansion": "French acide"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "acidus",
        "4": "",
        "5": "sour, acid"
      },
      "expansion": "Latin acidus (“sour, acid”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "agita"
      },
      "expansion": "Doublet of agita"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": ":bor",
        "3": "fr:acide",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂eḱ-\nProto-Indo-European *-éh₁ti\nProto-Indo-European *-yeti\nProto-Indo-European *-éh₁yeti\nProto-Indo-European *h₂eḱéh₁yeti\nProto-Italic *akēō\nLatin aceō\nProto-Indo-European *dʰeh₁-der.\nProto-Italic *-iðos\nLatin -idus\nLatin aciduslbor.\nFrench acidebor.\nEnglish acid"
    }
  ],
  "links": [
    [
      "*h₂eḱ-",
      "Reconstruction:Proto-Indo-European/h₂eḱ-#Proto-Indo-European:_sharp"
    ],
    [
      "*-éh₁ti",
      "Reconstruction:Proto-Indo-European/-éh₁ti"
    ],
    [
      "*-yeti",
      "Reconstruction:Proto-Indo-European/-yeti"
    ],
    [
      "*-éh₁yeti",
      "Reconstruction:Proto-Indo-European/-éh₁yeti"
    ],
    [
      "*akēō",
      "Reconstruction:Proto-Italic/akēō"
    ],
    [
      "aceō",
      "aceo#Latin"
    ],
    [
      "*dʰeh₁-",
      "Reconstruction:Proto-Indo-European/dʰeh₁-#Proto-Indo-European:_do"
    ],
    [
      "*-iðos",
      "Reconstruction:Proto-Italic/-iðos"
    ],
    [
      "-idus",
      "-idus#Latin"
    ],
    [
      "acidus",
      "acidus#Latin"
    ],
    [
      "acide",
      "acide#French"
    ],
    [
      "acide",
      "acide#French"
    ],
    [
      "acidus",
      "acidus#Latin"
    ],
    [
      "aceō",
      "aceo#Latin"
    ],
    [
      "agita",
      "agita#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "adj",
      "glosses": [
        "Sour, sharp, or biting to the taste; tart; having the taste of vinegar.",
        "Sour-tempered.",
        "Of or pertaining to an acid; acidic.",
        "Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock."
      ],
      "tags": [
        "figuratively"
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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 acid →

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
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