the quality of being wicked or villainous

बुरा या दुष्ट होना

English Usage: His flagitiousness was evident in his treacherous actions against his friends.

Hindi Usage: उसकी दुष्टता उसके दोस्तों के खिलाफ उसके विश्वासघाती कार्यों में स्पष्ट थी।