| entrancing(adjective, extraordinary, unusual, wonderful, marvelous) |
| exotic(adjective, obscure, happy, tender, perfect) |
| extramundane |
| fairy(noun, adjective, heavenly, paranormal, metaphysical) |
| fascinating(adjective, happy, tender, perfect, extraordinary) |
| fiendish(adjective, extraordinary, unusual, wonderful, marvelous) |
| forbidding(adjective, evil, threatening, nefarious, spooky) |
| foul(adjective, evil, threatening, nefarious, spooky) |
| garbled |
| heavenly(superior, outstanding, amazing, best, chosen) |
| heavy(obscure, complex, deep, rational, thoughtful) |
| hermetic(obscure, solid, dark, deep, unknown) |
| horrible(adjective, evil, threatening, nefarious, spooky) |
| hush-hush(quiet, clandestine, underground, undisclosed, intriguing) |
| imaginary(adjective, extraordinary, unusual, wonderful, marvelous) |
| impassable |
| incalculable |
| incognizable |
| incredible(superior, outstanding, amazing, best, chosen) |
| indeterminate |