ㄔㄥˊㄏㄨㄤˊㄔㄥˊㄎㄨㄥˇchénghuáng‑chéngkǒng

诚惶诚恐
  1. 古代套語表示臣子皇帝敬畏用來形容小心謹慎以至惶恐不安 這樣誇獎抬舉誠惶誠恐」。

in fear and trepidation (idiom)​; in reverence before your majesty (court formula of humility)​