于心无愧 yúxīnwúkuì to have a clear conscience Origin Definitions Defs Strokes Stroke Words Sentences Sents 于 於 yú preposition in Indicates a location, scope, or time; equivalent to 在 zài心 xīn noun heart the physical organ that pumps blood; refers to the chest area where the heart is located无愧 無愧 wúkuì to have a clear conscience to have nothing to be ashamed of; to feel no qualms