PROFICIENT


Meaning of PROFICIENT in English

■ adjective competent or skilled in doing or using something.

Derivatives

proficiency noun

~ly adverb

Origin

C16: from L. ~- , proficere 'to advance', from pro- 'on behalf of' + facere 'do, make'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.