proficient
/prəʊˈfɪʃənt/adjective
- competent or skilled in doing or using something精通的; 熟练的：
I was proficient at my job
我对自己的工作很精通
she felt reasonably proficient in Italian.
她觉得自己的意大利语挺熟练。
派生词
proficiency
nounproficiently
adverb词源
late 16th cent.: from Latin proficient- 'advancing'，from the verb proficere,from pro- 'on behalf of'+facere 'do，make'.