Abjure

• formally reject or disavow a formerly held belief, usually under pressure; "He retracted his earlier statements about his religion".
• Abjuration is the solemn repudiation, abandonment, or renunciation by or upon oath, often the renunciation of citizenship or some other right or privilege.
• To renounce upon oath; to forswear; to disavow; To renounce or reject with solemnity; to recant; to abandon forever; to reject; repudiate; To renounce on oath.