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proficient

adjective
 
 
/prəˈfɪʃ.ənt/

Definition

skilled and experienced: a proficient swimmer She's proficient in two languages. It takes a couple of years of regular driving before you become proficient at it.Skilled, talented and able proficiency
 
 
/-ən.si/ noun [U]
The job ad said they wanted proficiency in at least two languages.Skill, talent and ability
(Definition of proficient adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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