adjective
capable of performing; having an innate capacity
Synonyms: adept, adequate, adroit, agile, alert, apt, bright, capable, competent, cunning, deft, dexterous, easy, effortless, endowed, equipped, facile, fitted, good, intelligent, knowing, powerful, ready, smart, strong, worthy
Antonyms: ineffective, inept, infirm, powerless, unable, useless
adjective
able to perform well; having a proven capacity
Synonyms: accomplished, adroit, agile, artful, au fait, brilliant, capable, clever, deft, dexterous, effective, effectual, efficient, equal to, experienced, expert, facile, gifted, ingenious, intelligent, keen, know backwards and forwards, know one’s onions, know the ropes, learned, masterful, masterly, powerful, practiced, prepared, proficient, qualified, responsible, savvy, sharp, skilled, skillful, smart, talented, there, trained, up to it, up to snuff, up to speed, with it
Antonyms: delicate, feeble, inept, stupid, weak