betray

Definitions

To expose someone to danger by treacherously giving information to an enemy.

To break faith with or act disloyally toward a person, cause, or principle.

To unintentionally reveal or show evidence of a feeling or secret.

Examples

He felt that his closest friend had chosen to betray his trust for personal gain.

She was terrified that her trembling voice would betray her nervousness during the presentation.

It is considered a grave offense to betray one's country in times of war.

Synonyms

double-cross deceive forsake abandon mislead delude sell out

Antonyms

support defend protect uphold remain loyal be faithful guard