What is to violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known. Willing to serve or betray any government for hire. Macaulay called?

betray — To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known. Willing to serve or betray any government for hire. Macaulay. (Webster's 1913.)

Sources