Verb
To deliver into the hands of an enemy by treachery or fraud, in violation of trust; to give up treacherously or faithlessly; as, an officer betrayed the city.
To prove faithless or treacherous to, as to a trust or one who trusts; to be false to; to deceive; as, to betray a person or a cause.
To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known.
To disclose or discover, as something which prudence would conceal; to reveal unintentionally.
To mislead; to expose to inconvenience not foreseen to lead into error or sin.
To lead astray, as a maiden; to seduce (as under promise of marriage) and then abandon.
To show or to indicate; -- said of what is not obvious at first, or would otherwise be concealed.
Source: Webster's dictionaryActions always speak louder than words. Someone can yell at you for two hours... and help you. Another can smile at you for two years... and betray you. Source: Internet
A fraudulent intent, however carefully concealed at the outset, will generally, in the end, betray itself. Livy
Freedom is fragile and must be protected. To sacrifice it, even as a temporary measure, is to betray it. Germaine Greer
They only fall asleep after having mutually taken an oath and then they betray each other. Algerian Proverb
Noh care how boar hog try fi hide under sheep wool, ‘im grunt always betray ‘im. Jamaican Proverb
I need not fear my enemies because the most they can do is attack me. I need not fear my friends because the most they can do is betray me. But I have much to fear from people who are indifferent. Russian Proverb