*SET-U

English word origin

Etymology of adder

From Middle English nadder, addere, rebracketing of “a naddere” as “an addere”, from Old English nǣdre (“snake”), from Proto-West Germanic *nadrā, from Proto-Germanic *nadrǭ, from pre-Germanic *néh₁treh₂, variant of Prot

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.

Source etymology 1

Original entry ↗
noun

Any snake. · A small venomous serpent of the genus Vipera · A common European adder (Vipera berus). · A puff adder, of Africa (genus Bitis).

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

From Middle English nadder, addere, rebracketing of “a naddere” as “an addere”, from Old English nǣdre (“snake”), from Proto-West Germanic *nadrā, from Proto-Germanic *nadrǭ, from pre-Germanic *néh₁treh₂, variant of Proto-Indo-European *n̥h₁trih₂, from *(s)neh₁- (“to spin, twist”). See also West Frisian njirre, Dutch adder, German Natter, Otter; also Welsh neidr, Latin natrīx (“watersnake”), Dutch naaien.

Relationships mentioned by the source

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

This page abbreviates 5 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)neh₁-"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "nadder"
      },
      "expansion": "Middle English nadder"
    },
    {
      "name": "glossary",
      "args": {
        "1": "rebracketing"
      },
      "expansion": "rebracketing"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "nǣdre",
        "4": "",
        "5": "snake"
      },
      "expansion": "Old English nǣdre (“snake”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gmw-pro",
        "3": "*nadrā"
      },
      "expansion": "Proto-West Germanic *nadrā"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*nadrǭ"
      },
      "expansion": "Proto-Germanic *nadrǭ"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*n̥h₁trih₂"
      },
      "expansion": "Proto-Indo-European *n̥h₁trih₂"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "njirre"
      },
      "expansion": "West Frisian njirre"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "adder"
      },
      "expansion": "Dutch adder"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Natter"
      },
      "expansion": "German Natter"
    },
    {
      "name": "cog",
      "args": {
        "1": "cy",
        "2": "neidr"
      },
      "expansion": "Welsh neidr"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "natrīx",
        "3": "",
        "4": "watersnake"
      },
      "expansion": "Latin natrīx (“watersnake”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "naaien"
      },
      "expansion": "Dutch naaien"
    }
  ],
  "links": [
    [
      "nadder",
      "nadder#Middle_English"
    ],
    [
      "addere",
      "addere#Middle_English"
    ],
    [
      "nǣdre",
      "nædre#Old_English"
    ],
    [
      "*nadrā",
      "Reconstruction:Proto-West Germanic/nadrā"
    ],
    [
      "*nadrǭ",
      "Reconstruction:Proto-Germanic/nadrǭ"
    ],
    [
      "*néh₁treh₂",
      "Reconstruction:Proto-Indo-European/néh₁treh₂"
    ],
    [
      "*n̥h₁trih₂",
      "Reconstruction:Proto-Indo-European/n̥h₁trih₂"
    ],
    [
      "*(s)neh₁-",
      "Reconstruction:Proto-Indo-European/(s)neh₁-"
    ],
    [
      "njirre",
      "njirre#West_Frisian"
    ],
    [
      "adder",
      "adder#Dutch"
    ],
    [
      "Natter",
      "Natter#German"
    ],
    [
      "Otter",
      "Otter#German"
    ],
    [
      "neidr",
      "neidr#Welsh"
    ],
    [
      "natrīx",
      "natrix#Latin"
    ],
    [
      "naaien",
      "naaien#Dutch"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Any snake.",
        "A small venomous serpent of the genus Vipera",
        "A common European adder (Vipera berus).",
        "A puff adder, of Africa (genus Bitis)."
      ],
      "tags": [
        "obsolete",
        "UK"
      ],
      "recordId": "3bb755483f620e4aca9466b2aa318c769109d2f84a1d1a4d2b35fc94d6a91c52",
      "rawRecordSha256": "ed692e0a288c78dca0578f05e21f36b9f4fd0bb16126d9a5063c2492774ee4d1",
      "sourceRecordOrdinal": 172246
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}

Source etymology 2

Original entry ↗
noun

Someone who or something which performs arithmetic addition; a machine for adding numbers. · An electronic device that adds voltages, currents or frequencies. · Something which adds or increases.

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

Etymology tree English add Proto-Indo-European *-eh₂ Proto-Indo-European *-os? Proto-Indo-European *-o- Proto-Indo-European *-so- Proto-Indo-European *-eh₂so- Proto-Indo-European *-yós Proto-Indo-European *-eh₂s(i)yós Proto-Italic *-āsijos Proto-Italic *-āsios Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere ▲ Latin -ārius Old French -ierbor. Middle English -er English -er English adder From add + -er.

Inspect preserved source fields

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

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    {
      "name": "ety",
      "args": {
        "1": "en",
        "2": ":af",
        "3": "add",
        "4": "-er<id:agent noun>",
        "text": "+",
        "tree": "1"
      },
      "expansion": "Etymology tree\nEnglish add\nProto-Indo-European *-eh₂\nProto-Indo-European *-os?\nProto-Indo-European *-o-\nProto-Indo-European *-so-\nProto-Indo-European *-eh₂so-\nProto-Indo-European *-yós\nProto-Indo-European *-eh₂s(i)yós\nProto-Italic *-āsijos\nProto-Italic *-āsios\nLatin -āriusnom.\nLatin -āriusbor.\nProto-Germanic *-ārijaz\nProto-West Germanic *-ārī\nOld English -ere\nMiddle English -ere\n▲\nLatin -ārius\nOld French -ierbor.\nMiddle English -er\nEnglish -er\nEnglish adder\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"id\" : \"agent noun\", \"children\" : [ { \"keyword_abbrev\" : \"nom.\", \"keyword_label\" : \"Nominalization of\", \"terms\" : [ { \"id\" : \"adjective\", \"children\" : [ { \"terms\" : [ { \"id\" : \"adjective\", \"children\" : [ { \"terms\" : [ { \"alt\" : \"*-āsijos\", \"lang_name\" : \"Proto-Italic\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"alt\" : \"*-eh₂s(i)yós\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"alt\" : \"*-eh₂so-\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-eh₂\", \"status\" : \"ambiguous\", \"lang\" : \"ine-pro\" }, { \"alt\" : \"*-so-\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"inline\", \"children\" : [ { \"terms\" : [ { \"is_uncertain\" : true, \"id\" : \"athematic\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-os\", \"lang\" : \"ine-pro\" }, { \"alt\" : \"*-o-\", \"lang_name\" : \"Proto-Indo-European\", \"status\" : \"ok\", \"children\" : [ ], \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang\" : \"ine-pro\" }, { \"id\" : \"suffix\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*-yós\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Italic\", \"term\" : \"*-āsios\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"-ārius\", \"lang\" : \"la\" } ], \"keyword\" : \"nominalization\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"-ārius\", \"lang\" : \"la\" } ], \"keyword\" : \"bor\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-Germanic\", \"term\" : \"*-ārijaz\", \"lang\" : \"gem-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Proto-West Germanic\", \"term\" : \"*-ārī\", \"lang\" : \"gmw-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Old English\", \"term\" : \"-ere\", \"lang\" : \"ang\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Middle English\", \"term\" : \"-ere\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" }, { \"terms\" : [ { \"id\" : \"agentive\", \"children\" : [ { \"keyword_abbrev\" : \"bor.\", \"keyword_label\" : \"Borrowed from\", \"terms\" : [ { \"id\" : \"nouns\", \"children\" : [ { \"terms\" : [ { \"is_duplicate\" : true, \"children\" : [ ], \"id\" : \"agent noun\", \"status\" : { \"1\" : \"la\", \"2\" : \":nom\", \"3\" : \"-ārius<id:adjective>\", \"id\" : \"agent noun\", \"title\" : \"-ārius\", \"pos\" : \"suffix\" }, \"lang_name\" : \"Latin\", \"term\" : \"-ārius\", \"lang\" : \"la\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Old French\", \"term\" : \"-ier\", \"lang\" : \"fro\" } ], \"keyword\" : \"bor\" } ], \"status\" : \"ok\", \"lang_name\" : \"Middle English\", \"term\" : \"-er\", \"lang\" : \"enm\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"English\", \"term\" : \"-er\", \"lang\" : \"en\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"English\", \"term\" : \"adder\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"adder\">\nFrom add + -er."
    },
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      "args": {
        "1": "en",
        "2": ":af",
        "3": "add",
        "4": "-er<id:agent noun>",
        "text": "+",
        "tree": "1"
      },
      "expansion": "Etymology tree\nEnglish add\nProto-Indo-European *-eh₂\nProto-Indo-European *-os?\nProto-Indo-European *-o-\nProto-Indo-European *-so-\nProto-Indo-European *-eh₂so-\nProto-Indo-European *-yós\nProto-Indo-European *-eh₂s(i)yós\nProto-Italic *-āsijos\nProto-Italic *-āsios\nLatin -āriusnom.\nLatin -āriusbor.\nProto-Germanic *-ārijaz\nProto-West Germanic *-ārī\nOld English -ere\nMiddle English -ere\n▲\nLatin -ārius\nOld French -ierbor.\nMiddle English -er\nEnglish -er\nEnglish adder\nFrom add + -er."
    }
  ],
  "links": [
    [
      "add",
      "add#English"
    ],
    [
      "*-eh₂",
      "Reconstruction:Proto-Indo-European/-eh₂"
    ],
    [
      "*-os",
      "Reconstruction:Proto-Indo-European/-os#Proto-Indo-European:_athematic"
    ],
    [
      "*-yós",
      "Reconstruction:Proto-Indo-European/-yós#Proto-Indo-European:_suffix"
    ],
    [
      "*-āsios",
      "Reconstruction:Proto-Italic/-āsios#Proto-Italic:_adjective"
    ],
    [
      "-ārius",
      "-arius#Latin:_adjective"
    ],
    [
      "-ārius",
      "-arius#Latin:_agent_noun"
    ],
    [
      "*-ārijaz",
      "Reconstruction:Proto-Germanic/-ārijaz#Proto-Germanic:_noun"
    ],
    [
      "*-ārī",
      "Reconstruction:Proto-West Germanic/-ārī#Proto-West_Germanic:_agent_suffix"
    ],
    [
      "-ere",
      "-ere#Old_English:_agent_suffix"
    ],
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      "-ere",
      "-ere#Middle_English:_agent_suffix"
    ],
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      "-ārius",
      "-arius#Latin:_agent_noun"
    ],
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      "-ier#Old_French:_nouns"
    ],
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      "-er",
      "-er#Middle_English:_agentive"
    ],
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      "-er",
      "-er#English:_agent_noun"
    ],
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      "add#English"
    ],
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    ]
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  "lexical": [
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      "pos": "noun",
      "glosses": [
        "Someone who or something which performs arithmetic addition; a machine for adding numbers.",
        "An electronic device that adds voltages, currents or frequencies.",
        "Something which adds or increases."
      ],
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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 adder →

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-YWRkZXI