One's mind or inner feelings; thoughts, intentions, or emotions held within a person.
面接では胸中の不安を隠して落ち着いて答えた。
In the interview, he hid his inner anxiety and answered calmly.
胸中の悩みを友人に打ち明けた。
I confided my worries to a friend.
表向きは平静でも、彼の胸中は複雑だった。
Even if he appeared calm on the surface, his mind was complicated.
胸中を察して、彼女は何も問わなかった。
Sensing what was on his mind, she asked nothing.