It all depends how you want to use the word...
To invite someone to do something, especially take part in a contest.
It can be questioning a statement or fact, the demand for justification or explanation
It can be the demand of a sentry for the password
It can be an objection to a person selected to serve on a jury
It can be a demanding or stimulating career
He to challenge him to a sword fight.
It means taking up the challenge. Let's say I come and challenge you to a fight and you accept the challenge, we both will have a fight
It means you're ready to take anything on.
Answer Maybe they find mean girls to be a challenge for them.
if you challenge someone, ever heard of truth or DARE it's obvious you dare them to do something
It means to issue a challenge, usually in a very aggressive way, as if you are throwing down a gauntlet.
Challenge. Perchance.
To be vertically challenged means that you are short.
it means to stand up for yourself
'Dare' means "who" in Japanese.
Stimulating work is a job that isn't boring. It offers some degree of mental challenge to the worker, and the worker enjoys the challenge.
it means to give a bet to someone