<p><strong>Verb (used with object)</strong></p><ul><li>to reject or renounce under oath: to forswear an injurious habit.</li><li>to deny vehemently or under oath.</li><li>to perjure (oneself).</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to swear falsely; commit perjury.</li></ul>