平生 píngshēng all one's life Origin Definitions Defs Strokes Stroke Words Sentences Sents 素昧平生 sùmèipíngshēng unacquainted to have never met before; entirely unacquainted平生不做亏心事，半夜敲门心不惊 píngshēngbùzuòkuīxīnshì, bànyèqiāoménxīnbùjīng clear conscience Having never done anything wrong or shameful, one does not need to fear unexpected visitors or sudden troubles.