[cf. OED lye alkalized water, primarily that made by the lixiviation of vegeable ashes ... also water of lye (obs.)]

n. 1. water from a LYE BARREL: 1977 Lye water was kept in a wooden tub ... ashes and water were put into the tub when necessary (Albury 20). (Gen.)

2. water mixed with ashes for bathing the sick or dead. = ASHES WATER (Mayag.)