traitor
//ˈtreɪ.tər//
Noun
traitorSingular
traitorsPlural
1
A person who betrays their country, a cause, or a trust, especially by committing treason.
He was branded a traitor after selling military secrets to the enemy.
2
A person who is disloyal or acts treacherously toward a friend, group, or principle.
He was called a traitor for revealing the team's secrets to their rivals.