C1 noun /pərˈvɜr.sə.ti/
Perversity
堕落; 顽固;
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.
他拒绝帮助的堕落让所有人都沮丧。