<p><strong>Verb</strong></p><ul><li>to make intense or more intense.</li><li>to make more acute; strengthen or sharpen.</li><li>to increase the density and contrast of (a negative) chemically.</li><li>to become intense or more intense.</li></ul><p><strong>Synonyms</strong></p><ul><li>concentrate</li><li>quicken</li><li>deepen</li></ul><p><strong>Antonyms</strong></p><ul><li>weaken</li><li>alleviate</li></ul><p><strong>End of Response</strong></p>