彼の剛毅な態度は尊敬に値する。
His resolute attitude is worthy of respect.
祖父は剛毅な性格で、どんな逆境にも弱音を吐かなかった。
My grandfather had a stout-hearted character and never complained, whatever adversity he faced.
その武将は剛毅をもって知られ、部下からの信頼も厚かった。
The warlord was known for his fortitude and enjoyed the deep trust of his men.