challenge
challenge - noun
a demanding or stimulating situation
a call to engage in a contest or fight
questioning a statement and demanding an explanation
a formal objection to the selection of a particular person as a juror
a demand by a sentry for a password or identification
challenge - verb
- take exception to
- issue a challenge to
- ask for identification
- raise a formal objection in a court of law
challenge - thesaurus
dispute
gainsay