| indescribable(adjective, singular) |
| insolvable |
| insupposable(adjective, extraordinary, belief, strange, unbelievable) |
| invisible(adjective, obscure, dark, superior, mysterious) |
| legendary(adjective, obscure, dark, superior, mysterious) |
| magic(adjective, supernatural, imaginary, spiritual, mystic) |
| magical(adjective, strange, supernatural, unknown, spiritual) |
| metaphysical(adjective, obscure, dark, mysterious, supernatural) |
| mind-boggling(adjective, extraordinary, strange, unbelievable, implausible) |
| miraculous(adjective, obscure, dark, superior, mysterious) |
| mysterial(adjective, difficult, mysterious, secret, supernatural) |
| mystical(adjective, strange, supernatural, unknown, spiritual) |
| mystifying(adjective, strange, unfathomable, impenetrable, opaque) |
| mythical(adjective, obscure, dark, superior, mysterious) |
| mythological(adjective, obscure, dark, superior, mysterious) |
| necromantic(adjective, strange, supernatural, unknown, spiritual) |
| nonrational(adjective, supernatural, imaginary, spiritual, mystical) |
| not understandable(expression, adjective, incoherent, unfathomable, incomprehensible) |
| occult(adjective, obscure, dark, superior, strange) |
| opaque(adjective, incoherent, unfathomable, incomprehensible, impenetrable) |