uncharted

Universal Words adjective [usuallybeforenoun] 1 that has not been visited or investigated before; not familiar: They set off into the country's uncharted interior. * (figurative) The party is sailing in uncharted waters (= a situation it has not been in before). * (figurative) I was moving into uncharted territory (= a completely new experience) with this relationship. 2 not marked on a map: The ship hit an uncharted rock.