彼の不屈の精神は皆に感動を与えた。
His indomitable spirit moved everyone.
彼女は病と闘いながらも、不屈の努力で夢をかなえた。
While battling illness, she made her dream come true through unyielding effort.
その選手は何度負けても立ち上がる不屈の闘志で知られている。
That athlete is known for an unbreakable fighting spirit that gets him back up no matter how often he loses.