| sibylline(solid, dark, uncertain, mysterious, dense) |
| slurred |
| spectral(obscure, dark, superior, mysterious, supernatural) |
| sphinxlike(adjective, obscure, dark, uncertain, mysterious) |
| superhuman(obscure, dark, superior, mysterious, supernatural) |
| superior(obscure, dark, mysterious, supernatural, heavenly) |
| supermundane(obscure, dark, superior, mysterious, supernatural) |
| supernatural(adjective, obscure, dark, mysterious, paranormal) |
| superordinary(obscure, dark, superior, mysterious, supernatural) |
| superphysical(adjective, obscure, dark, supernatural) |
| supersensible(adjective, obscure, dark, superior, supernatural) |
| supranatural(obscure, dark, superior, mysterious, supernatural) |
| transcendental(obscure, dark, mysterious, supernatural, heavenly) |
| unavailing(adjective, strange, fantastic, irregular, improper) |
| unbalanced(adjective, strange, fantastic, irregular, improper) |
| uncanny(obscure, dark, superior, mysterious, supernatural) |
| uneven(strange, irregular, improper, odd, confused) |
| unexplicit(adjective, vague, unclear, ambiguous, misleading) |
| unimaginable |
| unintelligibly |