| unsound(adjective, delicate, uncertain, sensitive, rugged) |
| ambiguous(adjective, delicate, uncertain, unstable, doubtful) |
| chance(changeable, erratic, random) |
| changeable(irregular, unpredictable, unreliable, erratic, random) |
| clouded(uncertain, shaky, unclear, unlikely, questionable) |
| contingent(adjective, delicate, uncertain, unstable, doubtful) |
| crafty |
| cunning |
| equivocal(adjective, delicate, uncertain, unstable, doubtful) |
| explosive |
| fickle(changeable, erratic, random) |
| indecisive(adjective, delicate, uncertain, unstable, doubtful) |
| indeterminate(uncertain, shaky, unclear, unlikely, questionable) |
| on thin ice(expression, adjective, idiom, delicate, uncertain) |
| problematic(adjective, delicate, uncertain, unstable, doubtful) |
| treacherous(adjective, delicate, uncertain, unsound, rugged) |
| unstable(adjective, delicate, uncertain, irregular, doubtful) |
| variable(irregular, unpredictable, unreliable, changeable, erratic) |
| accidental |
| adventitious |