<p><strong>Noun</strong></p><ul><li>a person who is on an opposing side in a game, contest, controversy, or the like</li><li>adversary</li></ul><p><strong>Synonyms</strong></p><ul><li>antagonist</li></ul><p><strong>Antonyms</strong></p><ul><li>friend</li><li>ally</li></ul><p><strong>Adjective</strong></p><ul><li>being opposite, as in position</li><li>opposing</li><li>adverse</li><li>antagonistic</li></ul><p><strong>Anatomy</strong></p><ul><li>bringing parts together or into opposition, as a muscle</li></ul>