<p><strong>Adjective</strong></p><ul><li>sudden or unexpected: an abrupt departure.</li><li>Synonyms: sharp, quick</li><li>Antonyms: gradual</li><li>curt or brusque in speech, manner, etc.: an abrupt reply.</li><li>Synonyms: blunt, hasty, hurried, short</li><li>Antonyms: courteous, patient, deliberate</li><li>terminating or changing suddenly: an abrupt turn in a road.</li><li>Synonyms: sharp, quick</li><li>Antonyms: gradual</li><li>having many sudden changes from one subject to another; lacking in continuity or smoothness: an abrupt writing style.</li><li>Synonyms: uneven, broken, discontinuous</li><li>steep; precipitous: an abrupt descent.</li><li>Botany: truncate (def 4).</li></ul>