若有所失

ruòyǒusuǒshī
  1. as if one had lost something (idiom)
  2. to look or feel unsettled or distracted
  3. to feel empty

CEDICT

神情怅惘，有所失落的样子。南朝宋．刘义庆《世说新语．德行》：「吾时月不见黄叔度，则鄙吝之心已复生矣」句下刘孝标注引《典略》曰：「怅然若有所失。」《红楼梦．第六回》：「彼时宝玉迷迷惑惑，若有所失。」也作「若有所丧」、「若有所亡」。

重編國語辭典

Entry Composition

1 若 ruò
  1. to seem
  2. like
  3. as
  4. if
2 有所 yǒusuǒ
  1. somewhat
  2. to some extent
3 失 shī
  1. to lose
  2. to miss
  3. to fail