proficient

 
Pronunciation: /prəˈfɪʃ(ə)nt/

adjective

  • competent or skilled in doing or using something: I was proficient at my job she felt reasonably proficient in Italian

Derivatives

proficiently

adverb

Origin:

late 16th century: from Latin proficient- 'advancing', from the verb proficere, from pro- 'on behalf of' + facere 'do, make'