[noun] [U]He found her perversity (= unreasonable behaviour) and stubbornness extremely annoying.It took courage and a certain perversity (= a desire to do something unusual and unexpected) for her to shave her head.See also perversity at pervert.
PERVERSITY
Meaning of PERVERSITY in English
Cambridge English vocab. Кембриджский английский словарь. 2012