| occult |
| paradoxical(adjective, hard, delicate, complex, tricky) |
| thwarting(verb, adjective, hindering) |
| unexplainable(adjective, strange, unfathomable, inexplicable, puzzling) |
| arcane(adjective, obscure, difficult, solid, dark) |
| complicating(verb, adjective, hindering) |
| constraining(verb, adjective, hindering) |
| cramping(verb, adjective, hindering) |
| embarrassing |
| handicapping(verb, adjective, hindering) |
| hindering(verb, adjective, hindering) |
| labyrinthine(adjective, hard, difficult, complex, awkward) |
| obstructing(verb, adjective, hindering) |
| restraining(verb, adjective, hindering) |
| restricting(verb, adjective, hindering) |
| strange(adjective, unfathomable, inexplicable, puzzling, unexplained) |
| tangled(adjective, hard, complex, tricky, complicated) |
| unintelligible(adjective, hard, obscure, difficult, solid) |
| vague(adjective, obscure, difficult, uncertain, unclear) |
| Byzantine |