unknowable

adjective

1. not knowable; incapable of being known or understood.

noun

2. something that is unknowable.
3. the Unknowable, the postulated reality lying behind all phenomena but not cognizable by any of the processes by which the mind cognizes phenomenal objects.

adjective

1. incapable of being known or understood
2. 1. beyond human understanding
   2. (as noun)the unknowable

noun

1. the Unknowable philosophy the ultimate reality that underlies all phenomena but cannot be known