*SET-U

English word origin

Etymology of leach

From Middle English leche (“leachate; sluggish stream”), from Old English *lǣċ, *lǣċe (“muddy stream”), from Proto-Germanic *lēkijō (“a leak, drain, flow”) (compare Proto-Germanic *lekaną (“to leak, drain”)), from Proto-

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

A quantity of wood ashes, through which water passes, and thus imbibes the alkali. · A tub or vat for leaching ashes, bark, etc. · Alternative spelling of leech. · A jelly-like sweetmeat popular in the fifteenth century.

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

From Middle English leche (“leachate; sluggish stream”), from Old English *lǣċ, *lǣċe (“muddy stream”), from Proto-Germanic *lēkijō (“a leak, drain, flow”) (compare Proto-Germanic *lekaną (“to leak, drain”)), from Proto-Indo-European *leǵ- (“to leak”). Cognate with Old English leċċan (“to water, moisten”), Old English lacu (“stream, pool, pond”). More at leak, lake.

Relationships mentioned by the source

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

  • Inherited-form mentionlecheenm · leachate; sluggish stream
  • Inherited-form mention*lǣċang
  • Inherited-form mention*lēkijōgem-pro · a leak, drain, flow
  • Cognate mention*lekanągem-pro · to leak, drain
  • Derivation mention*leǵ-ine-pro · to leak
  • Cognate mentionleċċanang
  • Cognate mentionlacuang
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "leche",
        "t": "leachate; sluggish stream"
      },
      "expansion": "Middle English leche (“leachate; sluggish stream”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "*lǣċ"
      },
      "expansion": "Old English *lǣċ"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*lēkijō",
        "t": "a leak, drain, flow"
      },
      "expansion": "Proto-Germanic *lēkijō (“a leak, drain, flow”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "gem-pro",
        "2": "*lekaną",
        "t": "to leak, drain"
      },
      "expansion": "Proto-Germanic *lekaną (“to leak, drain”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*leǵ-",
        "t": "to leak"
      },
      "expansion": "Proto-Indo-European *leǵ- (“to leak”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "leċċan",
        "3": "",
        "4": "to water, moisten"
      },
      "expansion": "Old English leċċan (“to water, moisten”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "lacu",
        "3": "",
        "4": "stream, pool, pond"
      },
      "expansion": "Old English lacu (“stream, pool, pond”)"
    }
  ],
  "links": [
    [
      "leche",
      "leche#Middle_English"
    ],
    [
      "*lǣċ",
      "Reconstruction:Old English/læc"
    ],
    [
      "*lǣċe",
      "Reconstruction:Old English/læce"
    ],
    [
      "*lēkijō",
      "Reconstruction:Proto-Germanic/lēkijō"
    ],
    [
      "*lekaną",
      "Reconstruction:Proto-Germanic/lekaną"
    ],
    [
      "*leǵ-",
      "Reconstruction:Proto-Indo-European/leǵ-"
    ],
    [
      "leċċan",
      "leccan#Old_English"
    ],
    [
      "lacu",
      "lacu#Old_English"
    ],
    [
      "leak",
      "leak#English"
    ],
    [
      "lake",
      "lake#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A quantity of wood ashes, through which water passes, and thus imbibes the alkali.",
        "A tub or vat for leaching ashes, bark, etc.",
        "Alternative spelling of leech.",
        "A jelly-like sweetmeat popular in the fifteenth century."
      ],
      "tags": [
        "alt-of",
        "alternative"
      ],
      "recordId": "7ccb36d41e690831d94d365ccb839029830bcae1e454ecf4e2e7830fd934d5dd",
      "rawRecordSha256": "6cc7e3cf614716e0bc37c3b46bd5855363b29a45fefc46479ba4f0a9acbd883f",
      "sourceRecordOrdinal": 237889
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
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    "lexicalRecords": 0,
    "lexicalSenses": 0,
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  }
}

Source etymology 2

Original entry ↗
verb

To purge a soluble matter out of something by the action of a percolating fluid. · To part with soluble constituents by percolation. · To bleed; to seep.

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

From Middle English *lechen, *lecchen, from Old English leċċan, from Proto-Germanic *lakjaną, from Proto-Indo-European *leǵ- (“to leak”).

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": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "*lechen"
      },
      "expansion": "Middle English *lechen"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "leċċan"
      },
      "expansion": "Old English leċċan"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*lakjaną"
      },
      "expansion": "Proto-Germanic *lakjaną"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*leǵ-",
        "t": "to leak"
      },
      "expansion": "Proto-Indo-European *leǵ- (“to leak”)"
    }
  ],
  "links": [
    [
      "*lechen",
      "Reconstruction:Middle English/lechen"
    ],
    [
      "*lecchen",
      "Reconstruction:Middle English/lecchen"
    ],
    [
      "leċċan",
      "leccan#Old_English"
    ],
    [
      "*lakjaną",
      "Reconstruction:Proto-Germanic/lakjaną"
    ],
    [
      "*leǵ-",
      "Reconstruction:Proto-Indo-European/leǵ-"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To purge a soluble matter out of something by the action of a percolating fluid.",
        "To part with soluble constituents by percolation.",
        "To bleed; to seep."
      ],
      "tags": [
        "transitive",
        "intransitive",
        "figuratively"
      ],
      "recordId": "4c81847c640e9cbf233e8223557a840b9879bea5649bd798fe4ecf882c46ac18",
      "rawRecordSha256": "025cfb4eb93580c49f3e8d60dc26b044427819cbf824d77772b329fb24590f14",
      "sourceRecordOrdinal": 237890
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

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 leach →

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-bGVhY2g