untreated
adjective
un·treat·ed
ˌən-ˈtrē-təd 
: not treated
untreated wastewater
especially
: not improved or controlled medically
an untreated case of pneumonia
untreated diabetic patients
Examples of untreated in a Sentence
untreated wool
Recent Examples on the Web
Left untreated, most people who develop active TB will die of the disease.
—
John Green, The Atlantic, 15 Mar. 2025
If left untreated, fibrosis can progress to cirrhosis, which can lead to permanent liver damage and liver failure.
—Suchandrima Bhowmik, Health, 13 Mar. 2025
If left untreated, these can cause significant problems by leaving behind mineral and scale deposits that gradually build up inside pipes and plumbing fixtures throughout the home.
—Timothy Dale, Better Homes & Gardens, 11 Mar. 2025
Left untreated, amino acid metabolic disorders can lead to a buildup of toxic by-products or a deficiency of essential nutrients.
—Jonathan Purtell, Verywell Health, 10 Mar. 2025
See All Example Sentences for untreated
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John Green, The Atlantic, 15 Mar. 2025
If left untreated, fibrosis can progress to cirrhosis, which can lead to permanent liver damage and liver failure.
—Suchandrima Bhowmik, Health, 13 Mar. 2025
If left untreated, these can cause significant problems by leaving behind mineral and scale deposits that gradually build up inside pipes and plumbing fixtures throughout the home.
—Timothy Dale, Better Homes & Gardens, 11 Mar. 2025
Left untreated, amino acid metabolic disorders can lead to a buildup of toxic by-products or a deficiency of essential nutrients.
—Jonathan Purtell, Verywell Health, 10 Mar. 2025
See All Example Sentences for untreated
Cite this Entry
“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 23 Mar. 2025.
Copy CitationMedical Definition
untreated
adjective
un·treat·ed
-ˈtrēt-əd
: not subjected to treatment
an untreated disease
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