n. 25B6; adjective an adept negotiator : EXPERT, proficient, accomplished, skilful, talented, masterly, consummate, virtuoso; adroit, dexterous, deft, artful; brilliant, splendid, marvellous, formidable, outstanding, first-rate, first-class, excellent, fine; informal great, top-notch, tip-top, A1, ace, mean, hotshot, crack, nifty, deadly; Brit. informal a dab hand at; N. Amer. informal crackerjack.
inept.
25B6; noun kung fu adepts : EXPERT, past master, master, genius, maestro, doyen; informal wizard, demon, ace, hotshot, whizz; N. Amer. informal maven, crackerjack.
amateur.