若有所失 [－－－－]

Jyutping joek6 jau5 so2 sat1
Pinyin ruò yǒu suǒ shī

Definitions (CC-CEDICT)
  1. as if one had lost something (idiom)
  2. to look or feel unsettled or distracted
  3. to feel empty
Definitions (粵典–words.hk)
  1. 語句
    好似​唔​見​咗​啲​嘢​咁​；​失落​、​迷惘
    to be at a loss