Which word best describes agility in a person?

The word that best describes agility in a person is quickness. Agility refers to the ability to move rapidly and easily, demonstrating not just speed, but also the capacity to change direction with grace and control. It embodies the idea of being nimble and responsive, which is essential in various physical activities, sports, and even in cognitive tasks where quick, effective decision-making is required.

Quickness conveys this sense of swift movement and readiness, highlighting agility as a positive attribute associated with both physical prowess and mental acuity. In contrast, sturdiness implies strength and stability, which does not encompass the essence of agility. Weakness denotes a lack of strength or power, conflicting with the concept of being agile. Sluggishness suggests a slow and lethargic movement, directly opposing the idea of being quick and agile. Thus, quickness stands out as the most fitting description of agility.