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ablution (n.)[ablution 词源字典]: "ritual washing," late 14c., from Latin ablutionem (nominative ablutio), noun of action from past participle stem of abluere "to wash off," from ab- "off" (see ab-) + luere "wash," related to lavere (see lave).[ablution etymology, ablution origin, 英语词源]
cloaca (n.): 1650s, euphemism for "underground sewer," from Latin cloaca "public sewer, drain," from cluere "to cleanse," from PIE root *kleue- "to wash, clean" (cognates: Greek klyzein "to dash over, wash off, rinse out," klysma "liquid used in a washing;" Lithuanian šluoju "to sweep;" Old English hlutor, Gothic hlutrs, Old High German hlutar, German lauter "pure, clear"). Use in biology, in reference to eliminatory systems of lower animals, is from 1834. Related: Cloacal (1650s); cloacinal (1857).
elution (n.): "washing, purification," 1610s, from Late Latin elutionem (nominative elutio) "a washing out," noun of action from past participle stem of Latin eluere "to wash out, wash off, clean," from ex- "out" (see ex-) + luere "to wash" (see lave). Especially in reference to a process of obtaining sugar from molasses.
abluent: "Having the property of cleansing the body", Early 18th cent.; earliest use found in Glossographia Anglicana Nova. From classical Latin abluent-, abluēns, present participle of abluere to wash off or away from ab- + luere to wash.
abluted: "That has been washed clean", Mid 17th cent.; earliest use found in Tobias Venner (1577–1660), physician and medical writer. Originally from classical Latin ablūtus, past participle of abluere to wash off or away + -ed.