challenge

definition: a demand by a sentry for a password or identification
example:
speech part: noun
synonyms:
definition: questioning a statement and demanding an explanation
example: Their challenge of my argument was unfounded.
speech part: noun
synonyms:
definition: a formal objection to the selection of a particular person as a juror
example:
speech part: noun
synonyms:
definition: a call to engage in a contest or fight
example:
speech part: noun
synonyms:
definition: a demanding or stimulating situation
example: they reacted irrationally to the challenge of Russian power
speech part: noun
synonyms:
definition: to raise a formal objection in a court of law
example: I challenged the judge's ruling.
speech part: verb
synonyms: take exception
definition: to ask for identification
example: The illegal immigrant was challenged by the border guard
speech part: verb
synonyms:
definition: to issue a challenge to
example: I challenge you to a duel!
speech part: verb
synonyms:
definition: to take exception to
example: I challenged their claims.
speech part: verb
synonyms: dispute

challenge is explained and pronounced

How challenge is being used?