| abstruse(obscure, complex, deep, thoughtful, mysterious) |
| amorphous |
| arcane(obscure, complex, deep, mysterious, weird) |
| cabalistic(obscure, complex, deep, mysterious, weird) |
| deep(obscure, complex, thoughtful, mysterious, weird) |
| difficult(obscure, complex, deep, thoughtful, reflective) |
| esoteric(adjective, obscure, complex, deep, thoughtful) |
| heavy(adjective, severe, obscure, difficult, complex) |
| hermetic(obscure, complex, deep, thoughtful, mysterious) |
| hidden(obscure, complex, deep, mysterious, abstruse) |
| mysterious(obscure, complex, deep, thoughtful, reflective) |
| mystic(obscure, complex, deep, mysterious, abstruse) |
| mystical(obscure, complex, deep, mysterious, abstruse) |
| occult(adjective, obscure, complex, deep, thoughtful) |
| orphic(obscure, complex, deep, thoughtful, mysterious) |
| profound(adjective, obscure, complex, deep, thoughtful) |
| recondite(adjective, obscure, complex, deep, thoughtful) |
| scholarly(obscure, complex, deep, thoughtful, reflective) |
| secret(obscure, complex, deep, thoughtful, reflective) |
| ambiguous |