Refusing consent is an act of objecting or denying permission. There are several synonyms that can be used instead of the phrase "refuse consent" such as decline, disapprove, dissent, reject, negate, withhold and repudiate. Decline refers to denying an invitation or a request. To disapprove means not to approve or agree with something. Dissent signifies opposing a proposal or action. Reject signifies refusing acceptance or consideration. To negate denotes nullifying or denying the legitimacy of something. Withhold means to prevent or refuse to grant permission. Repudiate is used when someone is rejecting an offer or denouncing a relationship. These synonyms are all interchangeable depending on the context and desired tone of the communication.