betray

verb7

1. •
   to break someone's trust by secretly acting against them or telling lies to them

   • Quresh betrayed Sunil to marry Nuzhat.
   • My eyes have been betraying me since I turned sixty.
2. •
   To disclose or indicate, for example something which prudence would conceal; to reveal unintentionally.

   • Though he had lived in England for many years, a faint accent betrayed his Swedish origin.
3. •
   To deliver into the hands of an enemy by treachery or fraud, in violation of trust; to give up treacherously or faithlessly.

   • An officer betrayed the city.
   • He betrayed his own sister to the secret police.
4. •
   To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known.
5. •
   To disclose (a secret, etc.) in deliberate violation of someone’s confidence.

   • The dead leap at the throat, destroy The meaning of the day; dark forms Have scaled your walls, and spies betray Old secrets to amorphous swarms. — 1941
6. •
   To mislead; to expose to inconvenience not foreseen; to lead into error or sin.
7. •
   To lead astray; to seduce (as under promise of marriage) and then abandon.