胸

1. Origins, structure, and basic meaning

• Structure: 胸 is read as むね and can refer either to the physical chest or figuratively to the heart that holds feelings and memories.
• Basic usage: The context distinguishes a chest moving with breath from an inner place where a memory is kept.

2. Common pitfalls and similar expressions

• The physical chest
  • 胸が大きく上下する describes the chest visibly rising and falling from heavy breathing. Example: 坂を上り終えると、胸が大きく上下しました。
• Holding something in the heart
  • 胸に抱く figuratively means to cherish and retain a memory or thought in one's heart. Example: 卒業の日の思い出を今も胸に抱いています。