無語問蒼天 [无语问苍－]

Jyutping mou4 jyu5 man6 cong1 tin1
Pinyin wú yǔ wèn cāng tiān

Definitions (粵典–words.hk)
  1. 語句
    因為​極大​感​歎​、​無奈​或者​悲痛​而​無話​可​説
    to be dumbstruck; to have nothing to say; to be speechless