treasonous

/ˈtrizənəs/
adjective
  1. Involving or guilty of the crime of betraying one's country.
    • The general's treasonous actions led to the loss of an entire army division.
    • He was arrested for treasonous activities, including spying for a foreign government.
    • The treasonous plot to assassinate the president was uncovered by the secret service.
  2. Showing disloyalty or betrayal toward a person, group, or cause.
    • Voting against the party's main policy was seen as treasonous by other members.
    • It felt treasonous to leave her best friend alone at the party.
    • The employee's treasonous behavior included sabotaging the company's software.
What does "treasonous" mean? | whatsthatwordmean | whatsthatwordmean