UNKNOWABLE
a.That cannot be known.
unknowable
un know a ble |ˌənˈnōəbəl ˌənˈnoʊəbəl | ▶adjective not able to be known: the total cost is unknowable. DERIVATIVES un know a bil i ty |-ˌnōəˈbilətē |noun
un |know ¦able |ʌnˈnəʊəb (ə )l | ▶adjective not able to be known: the total cost is unknowable. DERIVATIVES unknowability |-ˈbɪlɪti |noun
ù n kn ó w a ble 形容詞 ⦅書 ⦆知ることのできない, 不可知の .