良苦用心 liángkǔyòngxīn to give much thought to something Origin Definitions Defs Strokes Stroke Words Sentences Sents 良苦 liángkǔ painstaking; very hard (literary) extremely laborious or painful; painstaking (often used in the phrase 用心 yòngxīn 良苦 liángkǔ to describe well-intentioned efforts)用心 yòngxīn motive motive; intention; underlying purpose