proficiency
🇺🇸
/prəˈfɪʃnsi/
🇬🇧
/prəˈfɪʃnsi/
noun
R
being very good at doing something because you have learned and practiced it
His proficiency in playing the piano comes from years of daily practice.
彼のピアノ演奏の熟練度は、長年にわたる日々の練習から来ています。
translation
熟練；精通
語形変化
Plural
proficiencies