wow, a CHALLENGING time,
to put it mildly.
Breaking Bad Season 2, Episode 10
"The CHALLENGING
climate of Scandinavia
The Big Bang Theory Season 12, Episode 23
Being your girlfriend is so CHALLENGING.
The Big Bang Theory Season 8, Episode 24
but the truth is,
Amy is just as CHALLENGING.
The Big Bang Theory Season 10, Episode 5
The guy's a genius. Maybe you weren't
CHALLENGING enough for him.
The Big Bang Theory Season 6, Episode 6