<p><strong>Verb</strong></p><ul><li>to act or avail against with equal power, force, or effect; counteract.</li><li>to furnish an equivalent of or a compensation for; offset.</li><li>Archaic: to equal.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to be of equal force in opposition; avail.</li></ul>