leach

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See also: Leach

English

Pronunciation

Etymology 1

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.

Noun

leach (plural leaches)

  1. A quantity of wood ashes, through which water passes, and thus imbibes the alkali.
  2. A tub or vat for leaching ashes, bark, etc.
    • 1894, Robert Barr, chapter 7, in In the Midst of Alarms:
      "This is the leach," said Kitty, pointing to a large, yellowish, upright wooden cylinder, which rested on some slanting boards, down the surface of which ran a brownish liquid that dripped into a trough.
  3. (nautical) Alternative spelling of leech.
  4. A jelly-like sweetmeat popular in the fifteenth century.
Translations

Etymology 2

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

Verb

leach (third-person singular simple present leaches, present participle leaching, simple past and past participle leached)

  1. (transitive) To purge a soluble matter out of something by the action of a percolating fluid.
    Heavy rainfall can leach out minerals important for plant growth from the soil.
    • 2014 April 21, Mary Keen, “You can still teach an old gardener new tricks: Even the hardiest of us gardeners occasionally learn useful new techniques [print version: Gardening is always ready to teach even the hardiest of us a few new tricks, 19 April 2014]”, in The Daily Telegraph (Gardening)‎, page G7:
      [T]he very wet winter will have washed much of the goodness out of the soil. Homemade compost and the load of manure we get from a friendly farmer may not be enough to compensate for what has leached from the ground.
  2. (intransitive) To part with soluble constituents by percolation.
    The gangue was leached to recover minerals left behind by the original technology.
  3. (figurative, intransitive) To bleed, seep.
    • 2007, Andrew Shanken, “The Sublime "Jackass"”, in Places, volume 19:
      A more generic geography, one where the suburb uneasily abuts the commercial and industrial, or leaches out to a nonurban frontier.
Usage notes

Do not confuse this verb with the verb leech.

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