LEACHとは 意味・読み方・使い方

語源 1

From 中期英語 leche (“leachate; sluggish stream”), from 古期英語 *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 古期英語 leċċan (“to water, moisten”), 古期英語 lacu (“stream, pool, pond”). More at leak, lake.

名詞

leach (plural leaches)

1. A quantity of wood ashes, through which water passes, and thus imbibes the alkali.

   Coordinate terms: leachant, leachate

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.
   • 1670, Hannah Woolley, “To make Leach and to colour it”, in The Queen-like Closet, Or, Rich Cabinet:

語源 2

From 中期英語 *lechen, *lecchen, from 古期英語 leċċan, from Proto-Germanic *lakjaną, from Proto-Indo-European *leǵ- (“to leak”).

動詞

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; to 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.

   • 2019 April 10, qntm, “CASE HATE RED”, in There Is No Antimemetics Division, →ISBN, page 140:

     There's a second half to each video. He remembers now. He watched it passively, over and over, and never saw it. Something comes through. It's been leaching into the background of the world this whole time, in plain sight, and he never saw it, and it's here now—

使用する際の注意点

• Not to be confused with the verb leech.

派生語

参考

• demineralize

アナグラム

• Hecla, chela