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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

However, if left untreated, it can become far more serious if the bacteria spreads to the organs, bloodstream or bones.

From BBC • Mar. 28, 2026

Colder nights will bring a higher risk of sharper widespread frost, particularly in rural areas, with icy patches possible on untreated surfaces.

From BBC • Mar. 24, 2026

About half were born to mothers who experienced untreated depression during or after pregnancy.

From Science Daily • Mar. 17, 2026

By nearly six months of age, when untreated mice typically have brains packed with amyloid plaques, the treated mice had no detectable plaques.

From Science Daily • Mar. 11, 2026

When I was seven, she begins, I had an intestinal disease that went untreated for lack of money to buy medicine.

From "Enrique's Journey" by Sonia Nazario