| equivocal(adjective, delicate, uncertain, unstable, doubtful) |
| far-fetched(shaky, unlikely, unpromising) |
| fat chance(expression, shaky, unlikely, unpromising) |
| fishy(shaky, unlikely, unpromising) |
| hairy(adjective, delicate, uncertain, unstable, doubtful) |
| hanging by a thread(expression, adjective, idiom, delicate, uncertain) |
| hazardous(adjective, delicate, uncertain, unstable, doubtful) |
| hazy(shaky, unlikely, unpromising) |
| iffy(adjective, delicate, uncertain, unstable, doubtful) |
| inconclusive(shaky, unlikely, unpromising) |
| indecisive(adjective, delicate, uncertain, unstable, doubtful) |
| indefinite(shaky, unlikely, unpromising) |
| indeterminate(shaky, unlikely, unpromising) |
| indistinct(shaky, unlikely, unpromising) |
| insecure(adjective, delicate, uncertain, unstable, doubtful) |
| loaded(adjective, delicate, uncertain, unstable, doubtful) |
| long shot(expression, doubtful, shaky, risky, unlikely) |
| obscure(shaky, unlikely, unpromising) |
| on thin ice(expression, adjective, idiom, delicate, uncertain) |
| open(uncertain, unstable, doubtful, shaky, tricky) |