度ど胸きょうが据すわる

expression, godan verb (-ru)

have steady nerves; be brave; be confident

Describes a state where one's courage is firmly settled, often used when facing a challenge or danger without flinching.

• 彼かれは度ど胸きょうが据すわっていて、どんなピンチでも冷れい静せいだ。

  He has steady nerves and stays calm in any crisis.

• 大おお舞ぶ台たいでも度ど胸きょうが据すわっている選せん手しゅは強つよい。

  A player who is confident even on the big stage is strong.