/pɚˈvɝː.sə.t̬i/
the quality of being strange and not what most people would do or expect: 任性，执拗，不合情理:
I think she disagreed with me out of sheer perversity.
adjective perverse
a perverse decision (= one that most people do not expect and think is wrong)
悖谬的决定
She finds a perverse pleasure in upsetting her parents.
她让父母担惊受怕，从任性中得到快乐。
Do you really mean that or are you just being deliberately perverse?
你是真要那样，还是故意作对？