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Showing results for untreated. Search instead for untreaded.
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.

Over time, untreated sleep apnea raises the risk of serious health problems, including high blood pressure, cardiovascular disease, stroke, and type 2 diabetes.

From Science Daily • Mar. 11, 2026

If untreated, acromegaly can lead to serious health problems and shorten life expectancy by about 10 years.

From Science Daily • Mar. 4, 2026

The burst sent some 240 million gallons of untreated waste from toilets and sinks into the Potomac.

From The Wall Street Journal • Feb. 19, 2026

With rain about, the Met Office has warned commuters to stay vigilant due to the risk of ice forming on untreated surfaces which could lead to travel disruption.

From BBC • Feb. 15, 2026

Many workers have noticed the tendency of resistant flies to rest more on untreated horizontal surfaces than on treated walls.

From "Silent Spring" by Rachel Carson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.