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
Synonyms
Examples of untreated in a Sentence
untreated wool
Recent Examples on the Web
In lab tests performed on mice with vitiligo, one group of the rodents received weekly EPS injections for a total of 18 weeks, while a control group was left untreated.
—
Ben Coxworth, New Atlas, 9 Feb. 2025
When botulism is left untreated, your body enters a state of complete respiratory paralysis, possibly leading to death, says Kuritzes.
—Caroline C. Boyle, USA TODAY, 7 Feb. 2025
What is tuberculosis? Also known as TB, tuberculosis is a contagious illness that can be fatal if left untreated.
—Eleanor Nash, Kansas City Star, 28 Jan. 2025
Left untreated, hypothermia can cause the heart and respiratory system to fail and eventually can lead to death.
—Barbara A. Perry, Newsweek, 27 Jan. 2025
See all Example Sentences for untreated 
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Ben Coxworth, New Atlas, 9 Feb. 2025
When botulism is left untreated, your body enters a state of complete respiratory paralysis, possibly leading to death, says Kuritzes.
—Caroline C. Boyle, USA TODAY, 7 Feb. 2025
What is tuberculosis? Also known as TB, tuberculosis is a contagious illness that can be fatal if left untreated.
—Eleanor Nash, Kansas City Star, 28 Jan. 2025
Left untreated, hypothermia can cause the heart and respiratory system to fail and eventually can lead to death.
—Barbara A. Perry, Newsweek, 27 Jan. 2025
See all Example Sentences for untreated
Dictionary Entries Near untreated
Cite this Entry
“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 21 Feb. 2025.
Copy CitationMedical Definition
untreated
adjective
un·treat·ed
-ˈtrēt-əd
: not subjected to treatment
an untreated disease
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