problem

Definitions
Examples

(noun): A difficulty that has to be resolved or dealt with.
(noun): A question to be answered, schoolwork exercise.
(noun): A puzzling circumstance.
(noun): Objection.
(noun): A set of moves required to complete a climb
(adjective): (of a person or an animal) Difficult to train or guide; unruly.
(adjective): Causing a problem; problematic; troublesome.

She's leaving because she faced numerous problems to do with racism.
You got a problem with that?