a heart of steel (a haato obu su-tiiru)

Idiom Emotions

意味

someone who is emotionally strong and unyielding

感情的に強く、動じない人物 (kan-jō-teki ni tsuyoku, dō-jinai jin-butsu)

例文

"Despite all the challenges, he handled everything with a heart of steel."

"すべての挑戦にもかかわらず、彼は鋼のような心で全てを処理しました。" (su-be-te no chō-sen ni mo ka-ka-wa-ra-zu, ka-re wa **ha-gane no yō na kokoro** de sube-te o shori shimashita.)