I don't know why Lisa is being difficult all she have to do is listen.

Quantum Physics is difficult.

Kristen said that she liked him, that she did not think he was difficult. He "would ask you to do things that, like, you might not think were safe...I have a way of dealing with that...I'd be like listen dude, you really want the sex? You know what I mean."

Old School Runescape is more difficult than Runescape 3 because you afk for longer.

i.e. Jasmine is difficult

I dislike the holidays because of the difficulty.