<p><strong>adjective</strong></p><ul><li>holding fast; characterized by keeping a firm hold (often followed by of): a tenacious grip on my arm; tenacious of old habits</li><li>highly retentive: a tenacious memory</li><li>persistent, stubborn, or obstinate</li><li>Synonyms: obstinate, persistent, pertinacious, dogged</li><li>adhesive or sticky; viscous or glutinous</li><li>Synonyms: clingy</li><li>holding together; cohesive; not easily pulled asunder; tough</li></ul>