<p><strong>Adjective</strong></p><ul><li>having a natural inclination or tendency to something; disposed; liable: to be prone to anger.</li><li>Synonyms: subject, apt.</li><li>having the front or ventral part downward; lying face downward.</li><li>lying flat; prostrate.</li><li>Synonyms: recumbent.</li><li>having a downward direction or slope.</li><li>having the palm downward, as the hand.</li></ul>