Etymology
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leach (v.)

"wash or drain by percolation of water, treat by downward drainage," by 1660s in cookery, perhaps from a dialectal survival from Old English leccan "to moisten, water, wet, irrigate," which, under Norse influence, became leak (v.). The word was used 18c. in technological senses, such as leach-trough, a device used in salt-works in which corns of salt taken from brine were set to drain  dry, after which they were called leach-brine. Related: Leached; leaching. Hence leach (n.) "a preparation made by leaching or straining" (1630s), in later use especially "a separation of lye or alkali in solution."

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Definitions of leach
1
leach (v.)
cause (a liquid) to leach or percolate;
leach (v.)
permeate or penetrate gradually;
the fertilizer leached into the ground
Synonyms: percolate
leach (v.)
remove substances from by a percolating liquid;
leach the soil
Synonyms: strip
2
leach (n.)
the process of leaching;
Synonyms: leaching
From wordnet.princeton.edu

Dictionary entries near leach

lazzarone

LCD

-le

le

lea

leach

leachate

lead

leaded

leaden

leader