A jigsaw puzzle.
Something that can be compared to a jigsaw puzzle.
A power saw with fine teeth and a narrow blade which can cut curves in wood or metal.
To cut something using a jigsaw.
A puzzling circumstance.
A difficulty that has to be resolved or dealt with.
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.