What does leached mean?
Leached describes material that has lost soluble components because water or another liquid passed through it. The process most often involves soil from which rainwater has washed away nutrients, leaving it unable to support vigorous plant growth. The word is also used in mining and metallurgy for material from which chemicals have extracted dissolved metals, and in descriptions of substances weakened by repeated loss. “Leached” is the past tense and past participle of “leach,” while “leaching” names the process. Although the term can be used figuratively for gradual financial, emotional, or organizational depletion, its established uses are chiefly agricultural, geological, and industrial. In ordinary discussion, “washed out” or “depleted” may sound more accessible, but “leached” is especially useful when the cause of the loss is the movement of water or another solvent through a material.
To wash or drain soluble substances out of a material by the passage of water or another liquid through it.
"Acid continued to leach valuable minerals from the ore."
Often used in soil science, mining, metallurgy, and environmental contexts. Figurative uses are possible but less common.
Having soluble substances washed or drained out; depleted of nutrients or other valuable components.
"The crop failed to grow in the heavily leached soil."
Especially established in technical descriptions of soil, ore, and materials altered by chemical or liquid extraction.
Leaching can strip farmland of life-giving nutrients, but the same process can also be used deliberately to extract valuable metals from rock.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of leached
The verb “leach” comes through Middle English from Old English, where it originally referred to making something wet or moist. Its meaning developed from wetting or percolating a material to the gradual washing out of soluble constituents. Modern technical usage reflects this long-standing sense, especially in soil science, mining, and metallurgy.
Related word forms
How leached is actually used
The word is most common in technical and environmental contexts. Its figurative use, as in losing money or confidence, is less frequent and should be used sparingly.
Easily confused with leached
A leech is a blood-sucking worm or a blood-sucking device, whereas leached describes material from which soluble substances have been washed out.