物もの思おもい

noun

deep thought; pensiveness; reverie

Refers to being lost in thought, often with a slightly melancholic or anxious tone. Can imply worry or simply deep contemplation.

• 彼かれは物もの思おもいにふけっていた。

  He was lost in thought.

• 物もの思おもいに沈しずんだ表ひょう情じょうをしている。

  She has a pensive look on her face.