challenge
//ˈtʃæləndʒ//
Noun
challengeSingular
challengesPlural
1
A difficult task or problem that tests someone's abilities or determination
Learning a new language is a real challenge.
2
An invitation or call to compete in a contest or fight
He accepted the challenge to a boxing match.
3
A formal objection or questioning of something, especially its validity or legality
The lawyer filed a challenge to the validity of the contract.
Synonym
Verb
challengeInfinitive
challengePresent tense
challengedPast tense
challengedPast participle
challengingPresent participle
challengesThird-person singular
1
To invite someone to compete or fight; to dare someone to do something
He challenged me to a game of chess.
2
To question or dispute the truth, validity, or authority of something
She challenged the accuracy of the report.
3
To test the abilities or determination of someone; to present difficulties to
This project will challenge you to think creatively.