untreated vs treated

untreated and treated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
untreated	No	Yes	No	No
treated	No	Yes	No	No

untreated (adjective)	treated (adjective)
not subjected to chemical or physical treatment	subjected to a physical (or chemical) treatment or action or agent
not given medical care or treatment	given medical care or treatment
(of a specimen for study under a microscope) not treated with a reagent or dye	made hard or flexible or resilient especially by heat treatment