Which adjective describes someone who is quick and skillful in both physical movement and mental agility?

The adjective "nimble" is used to describe someone who exhibits both quickness and skill in their movements, whether physical or mental. This term often conveys agility, dexterity, and the ability to think and act swiftly. For a person who is nimble, both their physical actions and cognitive processes are performed with ease and efficiency, highlighting their versatility and adeptness.

In contrast, the other terms do not capture this dual aspect of quickness and skillfulness. "Clumsy," "cumbersome," and "awkward" all suggest lack of grace or skill in movement or action, making them unsuitable to describe someone who is agile in both body and mind. Thus, "nimble" is the most fitting choice for someone who embodies these qualities.