| hazardous(adjective, difficult, delicate, uncertain, awkward) |
| in dispute |
| mysterious |
| perilous(adjective, difficult, delicate, uncertain, awkward) |
| refutable |
| risky(adjective, delicate, uncertain, awkward, unstable) |
| shady(adjective, uncertain, doubtful, unsettled, shaky) |
| tangled |
| touch-and-go(adjective, delicate, awkward, shaky, complicated) |
| abstruse(adjective, hard, fancy, difficult, complex) |
| amorphous(unclear, indistinct, indistinguishable) |
| contested(adjective, certain) |
| contingent(adjective, delicate, uncertain, unstable, doubtful) |
| critical(delicate, awkward, tricky, complicated, thorny) |
| dicey(adjective, delicate, uncertain, unstable, doubtful) |
| dodgy(adjective, dubious, suspect, shady, risky) |
| doubted |
| fractious(tough, unpleasant, unfortunate, trying, annoying) |
| improbable(adjective, uncertain, unreasonable, doubtful, shaky) |
| inconceivable(unreasonable, dubious, unlikely, flimsy, unbelievable) |