Abjure

Webster's Dictionary of the English Language

·vi To renounce on oath.

II. Abjure ·vt To renounce or reject with solemnity; to Recant; to abandon forever; to Reject; repudiate; as, to abjure errors.

III. Abjure ·vt To renounce upon oath; to Forswear; to Disavow; as, to abjure allegiance to a prince. To abjure the realm, is to swear to abandon it forever.