Synonyms of untreated

untreated

adjective

ˌən-ˈtrē-təd 

as in crude

being such as found in nature and not altered by processing or refining

untreated wool

Synonyms & Similar Words

• crude
• unprocessed
• natural
• raw
• native
• unrefined
• undressed
• in the raw
• undeveloped
• in the rough
• unfinished
• rude
• uncooked
• unpolished
• impure
• unfiltered
• semifinished
• rough-hewn

Antonyms & Near Antonyms

• treated
• dressed
• processed
• refined
• pure
• purified
• filtered

Example Sentences

Recent Examples of untreated

That irrigation water is untreated and nonpotable, intended for outdoor irrigation rather than drinking. — Idaho Statesman, 23 Aug. 2026

The consequences are visible in rates of suicide, substance use disorders, and untreated mental illness. — Rachel Docekal, STAT, 21 Aug. 2026

PennEnvironment says the Philadelphia Water Department dumps over 12 billion gallons of untreated sewage and stormwater a year into the Delaware and Schuylkill rivers and their tributaries. — Joe Brandt, CBS News, 17 Aug. 2026

The flesh-eating New World Screwworm is the parasitic larva that emerges from eggs laid by flies in the open wounds or body openings of warm-blooded animals and humans, with untreated cases potentially leading to severe injury or death. — Jeremy Hsu, ArsTechnica, 12 Aug. 2026