Definition of perverse adjective from the Oxford Advanced Learner's Dictionary

 

perverse

 adjective
adjective
BrE BrE//pəˈvɜːs//
 
; NAmE NAmE//pərˈvɜːrs//
 
 
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showing deliberate determination to behave in a way that most people think is wrong, unacceptable or unreasonable a perverse decision (= one that most people do not expect and think is wrong) She finds a perverse pleasure in upsetting her parents. Do you really mean that or are you just being deliberately perverse? For some perverse reason he is refusing to see a doctor. It would be perverse to quit now that we’re almost finished. Word Origin late Middle English (in the sense ‘turned away from what is right or good’): from Old French pervers(e), from Latin perversus ‘turned about’, from the verb pervertere, from per- ‘thoroughly, to ill effect’ + vertere ‘to turn’.Extra examples This kind of reasoning is deeply perverse. Do you really mean that, or are you just being deliberately perverse? It would be perverse to quit now that we’re almost finished.
See the Oxford Advanced American Dictionary entry: perverse