| strange(adjective, extraordinary, unusual, odd, remarkable) |
| funny(adjective, unusual, strange, odd, peculiar) |
| indecipherable(adjective, dark, uncertain, mysterious, unintelligibility) |
| opaque(adjective, obscure, uncertain, vague, indefinite) |
| paradoxical(adjective, hard, obscure, sophisticated, tricky) |
| profound(adjective, hard, obscure, tricky, complicated) |
| queer(adjective, extraordinary, unusual, strange, exceptional) |
| unaccountable(adjective, strange, unfathomable, perplexing, bewildering) |
| unexplained(adjective, unintelligibility) |
| unintelligible(adjective, obscure, strange, uncertain, vague) |
| abstract(hard, obscure, difficult, vague, tricky) |
| contradictory |
| convoluted(adjective, hard, fancy, obscure, difficult) |
| distracting(verb, false, awkward, uneasy, ambiguous) |
| doubtful(dark, strange, uncertain, unreasonable, vague) |
| dubious(unusual, strange, uncertain, unreasonable, vague) |
| esoteric(adjective, hard, evil, obscure, heavy) |
| indistinct(uncertain, vague, confused, unclear, ambiguous) |
| riddling |
| tough(adjective, difficult, laborious) |