betray

fe’l verb

1. 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
2. To prove faithless or treacherous to, as to a trust or one who trusts; to be false to; to deceive. My eyes have been betraying me since I turned sixty.
3. 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.
4. To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known.