challenge
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.
It is especially challenging to treat because it often returns after therapy.
From Science Daily
Researchers at Chalmers University of Technology in Sweden have now introduced a new type of minimal quantum "refrigerator" that turns this challenge into an advantage.
From Science Daily
Her co-star Spall called the location the show's "main character", as well as the challenge that the extreme weather creates for the drama's plot and characters.
From BBC
His strictly regulated factory model brooks no challenges from his workers, and he employs an enormous security force to snuff out the merest whisper of pro-union sentiment.
Small mammals are powerful indicators of environmental health, yet tracking them has long been a challenge because many species occupy different ecological roles while looking almost exactly alike.
From Science Daily
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
