Origin: Latin suffix -tion
Ablution has 3 different meanings across 1 category:
the ritual washing of a priest's hands or of sacred vessels
The act of washing something.
Originally, the purifying of oils and other substances by emulsification with hot water; now more generally, a thorough cleansing of a precipitate or other non-dissolved substance.
The word "ablution" comes from Middle English and Old French, ultimately deriving from the Late Latin term ablūtiō. This original Latin phrase meant "a washing away," combining elements for "away" and "to wash."