誠恐誠惶 [诚－诚－]

Jyutping sing4 hung2 sing4 wong4
Pinyin chéng kǒng chéng huáng

Definitions (Wiktionary)
  1. phrase, idiomatic
    to be filled with fear and anxiety
    (syn.) 誠惶誠恐, 诚惶诚恐