<p><strong>Adjective</strong></p><ul><li>full of or characterized by vigor: a vigorous effort.</li><li>Antonyms: weak, strong, active, robust: a vigorous youngster.</li><li>Synonyms: healthy, sound, sturdy.</li><li>Antonyms: weak.</li><li>energetic; forceful: a vigorous personality.</li><li>vigorous steps; a vigorous personality.</li><li>Synonyms: powerful.</li><li>Antonyms: weak.</li><li>powerful in action or effect: vigorous law enforcement.</li><li>Antonyms: weak.</li><li>growing well, as a plant.</li><li>Antonyms: weak.</li></ul>