adj. 25B6; adjective SKILFUL, adept, dexterous, deft, nimble, able, capable, skilled, expert, masterly, masterful, master, practised, polished, slick, proficient, accomplished, gifted, talented; quick-witted, quick-thinking, clever, smart, sharp, cunning, wily, resourceful, astute, shrewd, canny; informal nifty, crack, mean, wizard, demon, ace, A1, on the ball, savvy; N. Amer. informal crackerjack.
inept, clumsy.