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.
New findings may challenge traditional legal concepts such as mens rea, the "guilty mind" required to establish intent.
From Science Daily
The technology aims to make sense of fossil tracks that have long challenged researchers.
From Science Daily
In response to the public outcry, Nigeria's health minister has acknowledged "systemic challenges" in the health system and announced the creation of a national task force on "clinical governance and patient safety".
From BBC
To say that DeAndre Cole inherited a difficult challenge when he became the boys’ basketball coach at Compton Centennial this season would be an understatement.
From Los Angeles Times
Robinson often spoke out on civil rights, challenging both political parties.
From Los Angeles Times
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.