leach

ot noun

1. A jelly-like sweetmeat popular in the fifteenth century. 1670 Hannah Woolley The Queen-like Closet, Or, Rich Cabinet https//en.m.wikipedia.org/wiki/The_Queen-Like_Closet "To make Leach and to colour it"
2. A quantity of wood ashes, through which water passes, and thus imbibes the alkali.
3. A tub or vat for leaching ashes, bark, etc.
4. An aquatic blood-sucking annelid of class Hirudinea, especially Hirudo medicinalis.

fe’l verb

1. 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.
2. To part with soluble constituents by percolation.