perverse
🇺🇸
/pərˈvɜːrs/
🇬🇧
/pəˈvɜːs/
acting in a way that goes against what is expected or accepted as normal, often on purpose
It was perverse of him to do the opposite of what was asked.
頼まれたことの反対をするなんて、彼はひねくれている。