There are many different ways to describe something that is not yet known. One possible synonym is "unfamiliar," which suggests a lack of knowledge or understanding. Another option is "mysterious," which implies that there is something unknown or hidden about the subject in question. Another possible synonym for "in a way not yet known" is "enigmatic," which suggests a sense of puzzlement or uncertainty. Whatever term you use, it is important to remember that the unknown is often a source of fascination and exploration, both in life and in language.