胸むねに畳たたむ

expression, godan verb (-mu)

keep to oneself; bear in mind

Idiomatic expression meaning to keep something (often a secret, thought, or feeling) hidden in one's heart or mind, not revealing it to others.

• 彼かれはその秘ひ密みつを胸むねに畳たたんで、誰だれにも話はなさなかった。

  He kept the secret to himself and told no one.

• 彼かの女じょの言こと葉ばを胸むねに畳たたんで、これから頑がん張ばろうと思おもう。

  I'll bear her words in mind and do my best from now on.