A quality, endowment, or acquirement completely excellent; an ideal; faultlessness; especially, the divine attribute of complete excellence.
The quality or state of being perfect or complete, so that nothing substandard remains; the highest attainable state or degree of excellence
To perfect.
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.
Objection.
Difficulty in accepting or understanding or refusal to accept or understand.
Causing a problem; problematic; troublesome.
Difficult to train or guide; unruly.