untreated

adjective

un·​treat·​ed ˌən-ˈtrē-təd How to pronounce untreated (audio)
Synonyms of untreatednext
: not treated
untreated wastewater
especially : not improved or controlled medically
an untreated case of pneumonia
untreated diabetic patients

Synonyms of untreated

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Examples of untreated in a Sentence

untreated wool
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
His right arm was lame, the apparent result of an untreated stroke. — Ivana Sekularac, USA Today, 27 Aug. 2026 Uncovered, the untreated natural teak will patina to a matching silvery gray for a more aged wash while still maintaining its contemporary structure. — Audrey Lee, Architectural Digest, 26 Aug. 2026 Many would have experienced pain and distress from their untreated conditions, the healthcare professionals consulted by ProPublica said. — Audrey Dutton, ProPublica, 25 Aug. 2026 Letting mental health conditions go untreated is a risk to both the pregnant parent and the baby, Diaz Stransky said. — Lauren Mascarenhas, CNN Money, 23 Aug. 2026 See All Example Sentences for untreated

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of untreated was in the 15th century

Rhymes for untreated

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Browse Nearby Words

untreatable
untreated
untremulous
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Cite this Entry

“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 1 Sep. 2026.

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Medical Definition

untreated

adjective
un·​treat·​ed -ˈtrēt-əd How to pronounce untreated (audio)
: not subjected to treatment
an untreated disease
Last Updated: - Updated example sentences
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