...as they CHALLENGE
the preconceptions of the fields.
The Big Bang Theory Season 2, Episode 4
or a CHALLENGE to the system.
Money Heist Season 3, Episode 8
You really want to CHALLENGE yourself,
you could learn to speak Hindi.
The Big Bang Theory Season 10, Episode 22
The CHALLENGE is declined.
Vikings Season 1, Episode 6
Really give ourselves a CHALLENGE.
The Big Bang Theory Season 8, Episode 3