un briefed (adjective) uninformed: unaware
Sinonime: blind, caught napping, daydreaming, deaf,
ignorant, in the dark,
inattentive,
negligent, not informed, not told,
oblivious, out of it, out to lunch, unbriefed,
unconscious,
uneducated,
unenlightened, uninstructed,
unknowing, unschooled