| clouded(shaky, unlikely, unpromising) |
| contingent(adjective, open, delicate, uncertain, unstable) |
| critical |
| dangerous(adjective, delicate, uncertain, sensitive, unstable) |
| debatable(shaky, unlikely, unpromising) |
| disreputable(shaky, unlikely, unpromising) |
| doubtable(doubtful, shaky, risky, unlikely, unpromising) |
| doubtful(adjective, open, obscure, delicate, uncertain) |
| dubious(adjective, open, delicate, uncertain, nervous) |
| dubitable(shaky, unlikely, unpromising) |
| dynamite(adjective, delicate, uncertain, unstable, doubtful) |
| endangered(delicate, uncertain, unsound, dangerous, hazardous) |
| equivocal(adjective, open, delicate, uncertain, unstable) |
| far-fetched(shaky, unlikely, unpromising) |
| fat chance(expression, shaky, unlikely, unpromising) |
| fishy(shaky, unlikely, unpromising) |
| fraught with danger(expression, adjective, idiom, delicate, uncertain) |
| going for broke(expression, adjective, idiom, delicate, uncertain) |
| hairy(adjective, delicate, uncertain, sensitive, unstable) |
| hanging by a thread(expression, adjective, idiom, delicate, uncertain) |