*SET-U

English word origin

Etymology of leak

From Middle English leken (“to let water in or out”), from Old English *lecan (“to leak”), Middle Dutch leken (“to leak, drip”) or Old Norse leka (“to leak, drip”); all from Proto-Germanic *lekaną (“to leak, drain”), fro

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In this entry · 1 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

Original entry ↗
adj

Leaky.

verb

To allow fluid or gas to pass through an opening that should be sealed. · (of a fluid or gas) To pass through an opening that should be sealed. · To disclose secret information surreptitiously or anonymously. · To pass through when it would normally or preferably be blocked.

noun

A crack, crevice, fissure, or hole which admits water or other fluid, or lets it escape. · The entrance or escape of a fluid through a crack, fissure, or other aperture. · A divulgation, or disclosure, of information previously held secret. · The person through whom such divulgation, or disclosure, occurs.

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

From Middle English leken (“to let water in or out”), from Old English *lecan (“to leak”), Middle Dutch leken (“to leak, drip”) or Old Norse leka (“to leak, drip”); all from Proto-Germanic *lekaną (“to leak, drain”), from Proto-Indo-European *leg- (“to leak”). Cognate with Dutch lekken (“to leak”), German lechen, lecken (“to leak”), Danish lække (“to leak”), Swedish läcka (“to leak”), Norwegian Bokmål lekke (“to leak”), Faroese, Icelandic, and Norwegian Nynorsk leka (“to leak”). Related also to Old English leċċan (“to water, wet”), Albanian lag, lak (“to damp, make wet”). See also leach, lake. (divulgation, disclosure of information): Compare typologically Bulgarian изтичане (iztičane), Polish przeciek, Russian уте́чка (utéčka) (akin to течь impf or f (tečʹ)).

Relationships mentioned by the source

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

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.

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    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "leken",
        "4": "",
        "5": "to let water in or out"
      },
      "expansion": "Middle English leken (“to let water in or out”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "*lecan",
        "4": "",
        "5": "to leak"
      },
      "expansion": "Old English *lecan (“to leak”)"
    },
    {
      "name": "der",
      "args": {
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        "2": "dum",
        "3": "leken",
        "4": "",
        "5": "to leak, drip"
      },
      "expansion": "Middle Dutch leken (“to leak, drip”)"
    },
    {
      "name": "der",
      "args": {
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        "2": "non",
        "3": "leka",
        "4": "",
        "5": "to leak, drip"
      },
      "expansion": "Old Norse leka (“to leak, drip”)"
    },
    {
      "name": "inh",
      "args": {
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        "2": "gem-pro",
        "3": "*lekaną",
        "4": "",
        "5": "to leak, drain"
      },
      "expansion": "Proto-Germanic *lekaną (“to leak, drain”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*leg-",
        "4": "",
        "5": "to leak"
      },
      "expansion": "Proto-Indo-European *leg- (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "lekken",
        "3": "",
        "4": "to leak"
      },
      "expansion": "Dutch lekken (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "lechen"
      },
      "expansion": "German lechen"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "lække",
        "3": "",
        "4": "to leak"
      },
      "expansion": "Danish lække (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "läcka",
        "3": "",
        "4": "to leak"
      },
      "expansion": "Swedish läcka (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nb",
        "2": "lekke",
        "t": "to leak"
      },
      "expansion": "Norwegian Bokmål lekke (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fo,is,nn",
        "2": "leka",
        "3": "",
        "4": "to leak"
      },
      "expansion": "Faroese, Icelandic, and Norwegian Nynorsk leka (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "leċċan",
        "3": "",
        "4": "to water, wet"
      },
      "expansion": "Old English leċċan (“to water, wet”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sq",
        "2": "lag"
      },
      "expansion": "Albanian lag"
    },
    {
      "name": "sense",
      "args": {
        "1": "divulgation, disclosure of information"
      },
      "expansion": "(divulgation, disclosure of information):"
    },
    {
      "name": "m+",
      "args": {
        "1": "bg",
        "2": "изтичане"
      },
      "expansion": "Bulgarian изтичане (iztičane)"
    },
    {
      "name": "m+",
      "args": {
        "1": "pl",
        "2": "przeciek"
      },
      "expansion": "Polish przeciek"
    },
    {
      "name": "m+",
      "args": {
        "1": "ru",
        "2": "уте́чка"
      },
      "expansion": "Russian уте́чка (utéčka)"
    }
  ],
  "links": [
    [
      "leken",
      "leken#Middle_English"
    ],
    [
      "*lecan",
      "Reconstruction:Old English/lecan"
    ],
    [
      "leken",
      "leken#Middle_Dutch"
    ],
    [
      "leka",
      "leka#Old_Norse"
    ],
    [
      "*lekaną",
      "Reconstruction:Proto-Germanic/lekaną"
    ],
    [
      "*leg-",
      "Reconstruction:Proto-Indo-European/leg-"
    ],
    [
      "lekken",
      "lekken#Dutch"
    ],
    [
      "lechen",
      "lechen#German"
    ],
    [
      "lecken",
      "lecken#German"
    ],
    [
      "lække",
      "lække#Danish"
    ],
    [
      "läcka",
      "läcka#Swedish"
    ],
    [
      "lekke",
      "lekke#Norwegian_Bokmål"
    ],
    [
      "Faroese",
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    [
      "Icelandic",
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    ],
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      "leka",
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    [
      "leċċan",
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    ],
    [
      "lag",
      "lag#Albanian"
    ],
    [
      "lak",
      "lak#Albanian"
    ],
    [
      "leach",
      "leach#English"
    ],
    [
      "lake",
      "lake#English"
    ],
    [
      "изтичане",
      "изтичане#Bulgarian"
    ],
    [
      "przeciek",
      "przeciek#Polish"
    ],
    [
      "уте́чка",
      "утечка#Russian"
    ],
    [
      "течь",
      "течь#Russian"
    ]
  ],
  "references": [],
  "descendants": [],
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      "pos": "adj",
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        "To disclose secret information surreptitiously or anonymously.",
        "To pass through when it would normally or preferably be blocked."
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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 leak →

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-bGVhaw