The term "most unbriefed" implies a lack of knowledge or preparation. Synonyms for "most unbriefed" can include "uninformed," "unprepared," "clueless," "ignorant," "unschooled," "ill-advised," "unaware," "unfamiliar," "green" and "naive." These words all convey the idea that someone is lacking knowledge or experience in a particular area, and may not be equipped to handle a situation effectively. Whether referring to a person or an organization, the term "most unbriefed" suggests that there may be gaps in understanding or communication that need to be addressed in order to achieve success.