Treasonous (adjective)

Involved in or characterized by treason or treachery.

Origin:

Middle english: from old french treason, from latin traditio(n-) "delivery, surrender", from tradere "deliver".

Examples:

1. The traitor was charged with treasonous acts against the state.
2. The treasonous plot to overthrow the government was uncovered by the authorities.
3. The treasonous act of betraying one's country is considered a severe offense.
4. The treasonous conspiracy was aimed at overthrowing the elected government.
5. The treasonous activities of the spies threatened the stability of the nation.