| inapropos(adjective, strange, fantastic, irregular, improper) |
| inconclusive(obscure, uncertain, vague, unclear, indefinite) |
| incongruent(adjective, strange, fantastic, irregular, improper) |
| incongruous(adjective, strange, odd, confused, out) |
| indiscoverable |
| insensible(adjective, indifferent) |
| insoluble |
| insolvable |
| intricate(adjective, hard, delicate, loose, complex) |
| involved(adjective, hard, delicate, loose, complex) |
| irregular(adjective, strange, fantastic, detached, improper) |
| latent |
| legendary(obscure, dark, superior, mysterious, supernatural) |
| loose(adjective, hard, delicate, complex, detached) |
| metaphysical(obscure, dark, mysterious, supernatural, heavenly) |
| miraculous(obscure, dark, superior, mysterious, supernatural) |
| mismatched(adjective, strange, fantastic, irregular, improper) |
| mumbled |
| mystic(adjective, obscure, solid, dark, superior) |
| mystical(hard, obscure, delicate, complex, unknown) |