<p><strong>Adjective</strong></p><ul><li>Not possible; unable to be, exist, happen, etc.</li><li>Unable to be done, performed, effected, etc.: an impossible assignment.</li><li>Incapable of being true, as a rumor.</li><li>Not to be done, endured, etc., with any degree of reason or propriety: an impossible situation.</li><li>Utterly impracticable: an impossible plan.</li><li>Hopelessly unsuitable, difficult, or objectionable.</li></ul><p><strong>Synonyms</strong></p><ul><li>Unmanageable</li><li>Intolerable</li><li>Unbearable</li></ul>