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.
One woman said she felt sick and humiliated when she was challenged to show identification for her guide dog.
From BBC
A Brazilian man with a penchant for sporting records breaks a new one after tackling the most boring physical challenge he could dream up: running on a treadmill for 24 hours.
From Barron's
As a result, “the following year turned into an extremely challenging one across the board,” Reid noted.
From MarketWatch
And a big bonus: Today’s advanced manufacturing is a far cry from those days—safer, challenging, with many opportunities for advancement.
One of the biggest challenges comes from decoherence, a process that introduces errors into quantum systems.
From Science Daily
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.