To deny the truth or validity of (a statement or statements).
To be contrary to (something).
To oppose (a person) by denying the truth or pertinence of a given statement.
To declare publicly that one has made a vow, usually to show one's determination or to announce an act of retaliation.
To make a vow; to promise.
To make a vow regarding (something).
A solemn promise to perform some act, or behave in a specified manner, especially a promise to live and act in accordance with the rules of a religious order.
A declaration or assertion.