underhandedness

/ˌʌndərˈhændɪdnəs/
noun
  1. The quality or behavior of being secretive, dishonest, or deceitful in order to achieve something.
    • The manager was fired for his underhandedness in hiding company losses from investors.
    • The politician's underhandedness was exposed when secret recordings were released.
    • She was shocked by the underhandedness of her coworker, who took credit for her ideas.