沈ちん思し

noun, noun or participle which takes 'suru', transitive verb, intransitive verb

contemplation; meditation; deep thought

Refers to being lost in deep, often silent thought. Can be used as a noun or with する to mean 'to contemplate deeply'. Slightly literary.

• 彼かれはしばらく沈ちん思しした後あと、静しずかに話はなし始はじめた。

  After contemplating for a while, he began to speak quietly.