treated 1

not subjected to chemical or physical treatment

prepared or converted from a natural state by subjecting to a special process

(of sewage) treated with aeration and bacteria to aid decomposition

(of a liquid) treated by having air passed or bubbled through it for purification

treated by heating to a high temperature but below the melting or fusing point

treated or impregnated with a foreign substance

(of wood) darkened or colored by exposure to ammonia fumes