<p><strong>Adjective</strong></p><ul><li>of, relating to, or affected with lethargy; drowsy; sluggish; apathetic.</li></ul><p><strong>Synonyms</strong></p><ul><li><p>torpid</p></li><li><p>indolent</p></li><li><p>lazy</p></li><li><p>producing lethargy: The lethargic heat and humidity of the day made me want to do nothing but nap.</p></li></ul>