traitorous
/ˈtreɪtərəs/
adjective
- Betraying someone or something, such as a country, group, or trust; disloyal.
- The general was accused of traitorous actions when he secretly sold military secrets to the enemy.
- She felt that spreading false rumors about her best friend was a traitorous thing to do.
- The spy's traitorous behavior led to the downfall of the entire operation.