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)
"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.)
you can start fresh again tomorrow
to attack someone's most vulnerable point
to openly show emotions or feelings
To try every possible way to achieve something.
to give in to stress or pressure
to avoid laughing in a funny situation