
I'm having some DIFFICULTY bonding
with a colleague at work...
The Big Bang Theory Season 2, Episode 13

That's even factoring in your DIFFICULTY...
The Big Bang Theory Season 4, Episode 9

that you have DIFFICULTY
being close with her.
The Big Bang Theory Season 7, Episode 21

Does it involve DIFFICULTY
initiating a stream of anything?
The Big Bang Theory Season 7, Episode 7

Penny, are you experiencing
some sort of DIFFICULTY?
The Big Bang Theory Season 2, Episode 3