父は頑固で、一度決めたことは絶対に曲げない。
My father is stubborn; once he decides something, he never backs down.
彼の頑固さには周りの誰もが手を焼いている。
Everyone around him has trouble dealing with his obstinacy.
そんなに頑固にならないで、少しは人の話も聞いてよ。
Don't be so stubborn; listen to what other people have to say for once.