the ability to understand quickly and clearly

ability to understand and reason

the state of being very bright

genius

an occupation in which skill in using the hands is needed; such a skill

expertise, skill

skill in doing things using one's hands

aptitude, ability

(a particular) expert knowledge and skill

knowledge

a natural ability to do things

ability, skill

a delicate way of dealing with a situation

know-how, maneuver

common sense and initiative

nerve, initiative

the power to learn, understand and know; information, especially with reference to important events

ability to perceive, understand

Intelligence Quotient (a measure for comparing intelligence)

ability to perceive, understand

complete control or knowledge

command, expertise

a supply of goods, raw materials etc that a person, country etc has or can use; the ability to solve difficulties

supply drawn upon, either material or nonmaterial

the ability (from training and practice) to do something well

ability, talent to do something