精于 jīngyú proficient Origin Definitions Defs Strokes Stroke Words Sentences Sents 业精于勤 yèjīngyúqín mastery through diligence The principle that proficiency in studies or excellence in work is achieved through assiduous effort and hard work.精于此道 jīngyúcǐdào proficient to be highly skilled or proficient in a specific field, area, or activity