| unintelligible(adjective, knowledge, obscure, dark, superior) |
| incomprehensible(adjective, knowledge) |
| unfathomable(adjective, hard, knowledge, obscure, difficult) |
| impenetrable(adjective, knowledge, obscure, dark, superior) |
| obscure(adjective, dark, superior, deep, mysterious) |
| enigmatic(adjective, incomprehensible) |
| inexplicable |
| inscrutable(adjective, knowledge, incomprehensible) |
| mysterious(adjective, supernatural, heavenly, paranormal, incomprehensible) |
| opaque(adjective, incomprehensible) |
| unclear(adjective, incomprehensible) |
| cryptic(adjective, incomprehensible) |
| puzzling(adjective, incomprehensible) |
| abnormal(obscure, dark, superior, mysterious, supernatural) |
| celestial(obscure, dark, superior, mysterious, supernatural) |
| concealed(obscure, dark, superior, mysterious, supernatural) |
| enigmatical |
| fabulous(obscure, dark, superior, mysterious, supernatural) |
| fairy(obscure, dark, superior, mysterious, supernatural) |
| fathomless(adjective, incomprehensible) |