Lixiviate
Lixiviate , adjective
[From Lixivium.]
1.
Of or pertaining to lye or lixivium; of the quality of alkaline salts.
2.
Impregnated with salts from wood ashes. — Boyle
Also: Lixivited
Lixiviate , transitive verb
To subject to a washing process for the purpose of separating soluble material from that which is insoluble; to leach, as ashes, for the purpose of extracting the alkaline substances.