<p><strong>Verb (used without object)</strong></p><ul><li>to shake with a slight but rapid motion; vibrate tremulously; tremble.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to cause to shake or tremble.</li></ul><p><strong>Noun</strong></p><ul><li>the act or state of quivering; a tremble or tremor.</li></ul>