A question to be answered, schoolwork exercise.
A difficulty that has to be resolved or dealt with.
A puzzling circumstance.
A set of moves required to complete a climb.
Objection.
Difficulty in accepting or understanding or refusal to accept or understand.
Causing a problem; problematic; troublesome.
Difficult to train or guide; unruly.
A person who characteristically engages in such activity
An environment of rough activity
Rough activity; fighting or brawling; a fight.
active, vigorous and rough, with the possibility of harm
highly competitive
Engage in rough-and-tumble activity