adj. 25B6; adjective SKILLED, skilful, expert, experienced, accomplished, competent, masterly, adept, adroit, deft, dexterous, able, professional, consummate, complete, master; informal crack, ace, mean.
incompetent.
PROFICIENT
Meaning of PROFICIENT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012