slyness

noun
1
behaviour that is secret and dishonest, often intending to trick people
موذی‌گری, حیله‌گری, مکر, فریب‌کاری, مکاریت
synonym cunning
2
behaviour that suggests that you know something secret that other people do not know
حیله‌گری, موذی‌گری, دغل‌بازی