leach
leach / lēch/ • v. [tr.] make (a soluble chemical or mineral) drain away from soil, ash, or similar material by the action of percolating liquid, esp. rainwater: the nutrient is quickly leached away. ∎ [intr.] (of a soluble chemical or mineral) drain away from soil, ash, etc., in this way: coats of varnish prevent the dye leaching out. ∎ [tr.] subject (soil, ash, etc.) to this process.
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leach