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 a challenge that even two well known fictional physicists could not solve on television.
From Science Daily
Tracking enough of these constantly moving fish posed a challenge.
From Science Daily
But the real challenge, and the real joy, was building a pantry beyond salt, pepper and oil.
From Salon
They hold the hearings, take industry testimony and call it public input, even when no one from the public has enough information to challenge what is being approved.
From Salon
"This is an early indicator that the retail sector may well end the year on a positive note given the challenging times faced at the beginning of the year," she said.
From BBC
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.