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

If left untreated, necrotizing fasciitis can be fatal, sometimes within 48 hours. — Bill Sullivan, The Conversation, 11 Aug. 2026

Adherence is often low, and untreated sleep apnea can worsen hypertension, atrial fibrillation and the daytime sleepiness. — Jesse M. Pines, Forbes.com, 10 Aug. 2026

This untreated runoff makes its way through storm drains and ditches into our local streams and rivers and eventually, the ocean. — Jaclyn Cosgrove, Los Angeles Times, 6 Aug. 2026

If left untreated, gum disease can spread to the bones surrounding your gums, making chewing painful. — Julie Marks, Verywell Health, 5 Aug. 2026