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Synonyms

untreated

British  
/ ʌnˈtriːtɪd /

adjective

  1. (of an illness, etc) not having been dealt with

  2. not having been processed in any way

    untreated sewage

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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See Examples For:

According to the authors, this approach can result in hypertension remaining undetected, untreated, or insufficiently controlled.

From Science Daily ● Oct. 2, 2026

If left untreated, high blood pressure can increase the risk of heart attack, stroke and other serious cardiovascular problems.

From Science Daily ● Oct. 1, 2026

Keane said the problem was at least partly down to misconnections, where plumbing from housing developments is wrongly linked to surface water drains rather than sewers, sending untreated waste into waterways.

From BBC ● Sep. 30, 2026

Brand says Pike had untreated manic episodes due to bipolar disorder and untreated PTSD.

From BBC ● Sep. 26, 2026

This did not happen on nearby untreated areas.

From "Silent Spring" by Rachel Carson

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