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.
Despite this milestone, developing safer, non-toxic catalysts that can achieve similar performance at lower temperatures has remained an unresolved challenge.
From Science Daily
Roosevelt’s challenge to Wall Street, he writes, “was largely a bully pulpit affair, with rhetoric exceeding action.”
Apart from the "flawed rule" that required climbers to bring back less trash than they produce, authorities in the Everest region said lack of monitoring has been the main challenge.
From BBC
However, the proliferation of slop presents a lasting challenge as AI capabilities blur the line between human and AI creations.
From MarketWatch
Olson challenged students to develop a printable aluminum alloy stronger than any that existed at the time.
From Science Daily
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
