人心惟危 rénxīnwéiwēi human hearts are unfathomable Origin Definitions Defs Strokes Stroke Words Sentences Sents 人心 rénxīn noun human mind The human mind, psyche, or innate character of a person惟 wéi to be (literary) to be; used as a copula in formal or classical texts危 wēi noun dangerous (bound form) danger; precarious; in jeopardy; to endanger; to imperil