Meaning : Subjected to a physical (or chemical) treatment or action or agent.
Example :
The sludge of treated sewage can be used as fertilizer.
Treated timbers resist rot.
Treated fabrics resist wrinkling.
Meaning : Given medical care or treatment.
Example :
A treated cold is usually gone in 14 days; if left untreated it lasts two weeks.
Not given medical care or treatment.
An untreated disease.Meaning : Made hard or flexible or resilient especially by heat treatment.
Example :
A sword of tempered steel.
Tempered glass.
Synonyms : hardened, tempered, toughened
Not brought to a proper consistency or hardness.
Untempered mortar.