Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: , present participle of proficere 'to go forward, get something done'

proficient

adjective
     
pro‧fi‧cient
able to do something well or skilfully
proficient in/at
Martha's proficient in Swedish.
There's only one way to become proficient at anything - practice!
a proficient typist
proficiently adverb

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