n.刚毅；坚毅；不屈不挠

I know that my body lacks the fortitude and courage of a strapping young man, and that I cannot find my niche in life. 我知道我身上缺少一个男子汉所应该有的刚毅和果敢，顶不起一片天空。

Patience and fortitude conquer all things. 耐心与坚毅征服一切。

People who lack internal fortitude often become victims of those who have self-discipline. 那些缺乏内在坚毅的人往往会成为那些自律性很强的人的牺牲品。