*SET-U

English word origin

Etymology of why

From Middle English why, from Old English hwȳ (“why”), from Proto-Germanic *hwī (“by what, how”), from Proto-Indo-European *kʷey, instrumental case of *kʷís (“who”), *kʷid (“what”). Cognate with Old Saxon hwī (“why”), hw

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

Reason.

adv

Introducing a complete question. · With a negative, used rhetorically to make a suggestion. · Introducing a verb phrase (bare infinitive clause). · Introducing a noun or other phrase.

intj

An exclamation used to express pleasant or unpleasant mild surprise, indignation, or impatience.

verb

To ask (someone) the question "why?".

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

From Middle English why, from Old English hwȳ (“why”), from Proto-Germanic *hwī (“by what, how”), from Proto-Indo-European *kʷey, instrumental case of *kʷís (“who”), *kʷid (“what”). Cognate with Old Saxon hwī (“why”), hwiu (“how; why”), Middle High German wiu (“how, why”), archaic Danish and Norwegian Bokmål hvi (“why”), Norwegian Nynorsk kvi (“why”), Swedish vi (“why”), Faroese and Icelandic hví (“why”), Latin quī (“why”), Doric Greek πεῖ (peî, “where”), Ukrainian чи (čy, “if”), Polish czy, Czech či (“or”), Serbo-Croatian či (“if”). Compare Old English þȳ (“because, since, on that account, therefore, then”, literally “by that, for that”). See thy.

Relationships mentioned by the source

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

  • Root classification mention*kʷ-ine-pro
  • Inherited-form mentionwhyenm
  • Inherited-form mentionhwȳang · why
  • Inherited-form mention*hwīgem-pro · by what, how
  • Derivation mention*kʷeyine-pro
  • Cognate mentionhwīosx · why
  • Cognate mentionwiugmh
  • Cognate mentionkvinn
  • Cognate mentionvisv
  • Cognate mentionquīla
  • Cognate mentionчиuk
  • Cognate mentionczypl
  • Cognate mentiončics
  • Cognate mentiončish
  • Cognate mentionþȳang

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": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*kʷ-"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "why"
      },
      "expansion": "Middle English why"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "hwȳ",
        "t": "why"
      },
      "expansion": "Old English hwȳ (“why”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*hwī",
        "t": "by what, how"
      },
      "expansion": "Proto-Germanic *hwī (“by what, how”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*kʷey"
      },
      "expansion": "Proto-Indo-European *kʷey"
    },
    {
      "name": "cog",
      "args": {
        "1": "osx",
        "2": "hwī",
        "t": "why"
      },
      "expansion": "Old Saxon hwī (“why”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "gmh",
        "2": "wiu",
        "3": "",
        "4": "how, why"
      },
      "expansion": "Middle High German wiu (“how, why”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "-"
      },
      "expansion": "Danish"
    },
    {
      "name": "cog",
      "args": {
        "1": "nb",
        "2": "-"
      },
      "expansion": "Norwegian Bokmål"
    },
    {
      "name": "cog",
      "args": {
        "1": "nn",
        "2": "kvi",
        "3": "",
        "4": "why"
      },
      "expansion": "Norwegian Nynorsk kvi (“why”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "vi",
        "3": "",
        "4": "why"
      },
      "expansion": "Swedish vi (“why”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fo",
        "2": "-"
      },
      "expansion": "Faroese"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "-"
      },
      "expansion": "Icelandic"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "quī",
        "3": "",
        "4": "why"
      },
      "expansion": "Latin quī (“why”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "grc-dor",
        "2": "πεῖ",
        "3": "",
        "4": "where"
      },
      "expansion": "Doric Greek πεῖ (peî, “where”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "uk",
        "2": "чи",
        "3": "",
        "4": "if"
      },
      "expansion": "Ukrainian чи (čy, “if”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "pl",
        "2": "czy"
      },
      "expansion": "Polish czy"
    },
    {
      "name": "cog",
      "args": {
        "1": "cs",
        "2": "či",
        "3": "",
        "4": "or"
      },
      "expansion": "Czech či (“or”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sh",
        "2": "či",
        "3": "",
        "4": "if"
      },
      "expansion": "Serbo-Croatian či (“if”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "þȳ",
        "3": "",
        "4": "because, since, on that account, therefore, then",
        "lit": "by that, for that"
      },
      "expansion": "Old English þȳ (“because, since, on that account, therefore, then”, literally “by that, for that”)"
    }
  ],
  "links": [
    [
      "why",
      "why#Middle_English"
    ],
    [
      "hwȳ",
      "hwy#Old_English"
    ],
    [
      "*hwī",
      "Reconstruction:Proto-Germanic/hwī"
    ],
    [
      "*kʷey",
      "Reconstruction:Proto-Indo-European/kʷey"
    ],
    [
      "*kʷís",
      "Reconstruction:Proto-Indo-European/kʷís"
    ],
    [
      "*kʷid",
      "Reconstruction:Proto-Indo-European/kʷid"
    ],
    [
      "hwī",
      "hwi#Old_Saxon"
    ],
    [
      "hwiu",
      "hwiu#Old_Saxon"
    ],
    [
      "wiu",
      "wiu#Middle_High_German"
    ],
    [
      "hvi",
      "hvi#Danish"
    ],
    [
      "kvi",
      "kvi#Norwegian_Nynorsk"
    ],
    [
      "vi",
      "vi#Swedish"
    ],
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      "hví",
      "hví#Faroese"
    ],
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      "quī",
      "qui#Latin"
    ],
    [
      "πεῖ",
      "πεῖ#Ancient_Greek"
    ],
    [
      "чи",
      "чи#Ukrainian"
    ],
    [
      "czy",
      "czy#Polish"
    ],
    [
      "či",
      "či#Czech"
    ],
    [
      "či",
      "či#Serbo-Croatian"
    ],
    [
      "þȳ",
      "þy#Old_English"
    ],
    [
      "thy",
      "thy#English"
    ]
  ],
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        "Reason."
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        "An exclamation used to express pleasant or unpleasant mild surprise, indignation, or impatience."
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      "glosses": [
        "To ask (someone) the question \"why?\"."
      ],
      "tags": [
        "intransitive",
        "transitive"
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}

Source etymology 2

Original entry ↗
noun

A young heifer.

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

A variant of quey.

Inspect preserved source fields

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

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      "args": {
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    [
      "quey",
      "quey#English"
    ]
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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 why →

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-d2h5