Undivulged means that something has not been disclosed or revealed, so antonyms would be words that suggest openness or sharing. Some possible antonyms for "more undivulged" include "revealed," "disclosed," "open," "transparent," "frank," "forthcoming," "exposed," "public," and "unveiled." These words indicate a degree of honesty, candor, and authenticity, which stand in contrast to the secrecy and privacy of something that is undivulged. By using these antonyms, we can describe situations or information that is open, accessible, and honest, rather than hidden, concealed, or undisclosed.