<p><strong>Adjective</strong></p><ul><li>having or exerting great power or force.</li><li>Synonyms: strong, forceful</li><li>Antonyms: weak</li><li>physically strong, as a person: a large, powerful athlete.</li><li>producing great physical effects, as a machine or a blow.</li><li>potent; efficacious: a powerful drug.</li><li>having great effectiveness, as a speech, speaker, description, reason, etc.</li><li>Synonyms: effective, cogent, forcible, convincing, influential</li><li>having great power, authority, or influence; mighty: a powerful nation.</li><li>Chiefly South Midland and Southern U.S.: great in number or amount: a powerful lot of money.</li></ul>