C1 noun /pərˈvɜr.sə.ti/
Perversity
перверсия; упрямство;
Meaning
deliberate determination to behave in an unreasonable or unacceptable way; the quality of being contrary or obstinate
Example
His perversity in refusing help frustrated everyone.
его перверсия в отказе от помощи разочаровала всех.