complicity
n[U]
~ (in sth) action of taking part with another person (in a crime or some other wrongdoing); shared responsibility 合谋; 串通
He was suspected of complicity in her murder. 他涉嫌合谋将她杀害.
It has always been a mystery to me who city dwellers, who appreciate all these things, obstinately pretend that they would prefer to live in the country.