untreated
Britishadjective
-
(of an illness, etc) not having been dealt with
-
not having been processed in any way
untreated sewage
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.
Melanoma is the most serious form of skin cancer and, untreated, can be deadly.
From BBC • May 21, 2026
All of those properties stand close to Coronado’s wide, sandy beaches — which means they all face challenges as waters are often fouled by the northward flow of untreated sewage from greater Tijuana.
From Los Angeles Times • May 13, 2026
Young mice showed low levels of the MDM2 protein, while untreated older mice had much higher levels.
From Science Daily • May 9, 2026
One facility, San Antonio de los Buenos, can’t handle the volume, so mostly untreated sewage pours through a canyon creek and into the Pacific 5 miles south of the border, U.S. officials said.
From The Wall Street Journal • May 4, 2026
Kwadzo died one morning, probably from his untreated wound, Amari thought, or maybe from his untreated sorrow, but she could not mourn his loss.
From "Copper Sun" by Sharon M. Draper
![]()
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.