Machiavellian

adjective
Ma·​chi·​a·​vel·​lian | \ ˌma-kē-ə-ˈve-lē-ən How to pronounce Machiavellian (audio) , -ˈvel-yən\

Definition of Machiavellian

1 : of or relating to Machiavelli or Machiavellianism
2 : suggesting the principles of conduct laid down by Machiavelli specifically : marked by cunning, duplicity, or bad faith He relied on Machiavellian tactics to get elected.