<p><strong>Verb (used with object):</strong></p><ul><li><p>to disturb the self-possession of; perturb; ruffle:</p><ul><li>Example: Her angry reply disconcerted me completely.</li></ul></li><li><p>Synonyms:</p><ul><li>discomfit</li><li>abash</li><li>bewilder</li><li>perplex</li><li>discompose</li></ul></li><li><p>Antonyms:</p><ul><li>calm</li></ul></li><li><p>to throw into disorder or confusion; disarrange:</p><ul><li>Example: He changed his mind and disconcerted everybody's plans.</li></ul></li><li><p>Antonyms:</p><ul><li>arrange</li></ul></li></ul>