expert; skilled

very able

fully awake and ready to act, speak etc

attentive, lively

quick at seeing how to gain an advantage

perceptive

looking and listening carefully

concentrating

having mental or physical ability

able to perform

(of a person) having the necessary ability, power, authority, skill, knowledge etc

able

true; right

accurate, exact

able to bring about the result intended

productive, persuasive

quite large, extensive etc

acceptable

giving care and thought to something

attentive, aware

quick at noticing things

alert, watchful

in good order; all right; to give one's approval to (a plan, idea etc)

acceptable

of a profession; doing something in a way hat shows care or concern

skilled, trained

acting, done, sent, given, without delay; to be the reason causing (a person) to do something; to follow the text of a play and tell (an actor) what to say if he or she forgets

early, responsive

a person who prompts

early, responsive

(US = skillful) having or showing skill

able, talented

neat and clean in appearance; fashionable; part of high society; intelligent; quick; to become painful; to feel angry, annoyed

intelligent

keeping careful watch

careful, watchful