(as) stubborn as a mule
01
頑固すぎる, 自分の考えを曲げない
used to describe someone who refuses to change their opinion or chosen course of action
例
My brother is stubborn as a mule and won't admit he's wrong.
兄は頑固すぎて、自分が間違っていると認めない。
頑固すぎる, 自分の考えを曲げない
兄は頑固すぎて、自分が間違っていると認めない。