<p><strong>Adjective:</strong></p><ul><li>unhappy;</li><li>sad;</li><li>miserable;</li><li>wretched: Why is she so unhappy?</li><li>unfortunate;</li><li>unlucky: an unhappy incident.</li><li>unfavorable;</li><li>inauspicious: an unhappy omen.</li><li>infelicitous;</li><li>unsuitable: an unhappy choice of words.</li><li>causing trouble;</li><li>reprehensible;</li><li>troublesome.</li></ul><p><strong>Noun:</strong></p><ul><li>an unfortunate person.</li></ul>