<p><strong>Adverb:</strong></p><ul><li>Gladly: Willingly; He fain would accept.</li></ul><p><strong>Adjective:</strong></p><ul><li>Fain: Willing; They were fain to go.</li><li>Archaic: Constrained; obliged: He was fain to obey his Lord.</li><li>Archaic: Glad; pleased.</li><li>Archaic: Desirous; eager.</li></ul>