A disadvantage; something that detracts or takes away.
The inhalation of a lungful of smoke from a cigarette.
A partial refund of an import fee, as when goods are re-exported from the country that collected the fee.
Objection.
A difficulty that has to be resolved or dealt with.
A puzzling circumstance.
A set of moves required to complete a climb.
A question to be answered, schoolwork exercise.
Difficulty in accepting or understanding or refusal to accept or understand.
Causing a problem; problematic; troublesome.
Difficult to train or guide; unruly.