The term more unbriefed means less informed or less knowledgeable about a certain topic or situation. To find an antonym for this, we need to look for a term that means more informed or having a better understanding of something. Some words that can be used as antonyms for more unbriefed include informed, knowledgeable, educated, skillful, experienced, proficient, expert, well-versed, and well-informed. By using these terms, we can describe someone who knows and understands a particular subject matter, being the opposite of someone who is uninformed or ill-informed. Using antonyms helps to provide clarity and precision in communication, making it easier to convey the intended message.