betray
US /bɪˈtreɪ/
UK /bɪˈtreɪ/

1.
revelar, delatar
to reveal (information) unintentionally or by disloyalty
:
•
His nervous laughter betrayed his true feelings.
Su risa nerviosa delató sus verdaderos sentimientos.
•
He betrayed the secret location of the hideout.
Él reveló la ubicación secreta del escondite.
2.
traicionar
to be disloyal to (one's country, a person, or an organization) by disclosing secrets or otherwise aiding an enemy
:
•
He was accused of betraying his country.
Fue acusado de traicionar a su país.
•
She felt betrayed by her closest friend.
Se sintió traicionada por su amiga más cercana.