| hazardous(shaky, unlikely, unpromising) |
| hazy(doubtful, shaky, vague, hesitant, changeable) |
| hesitant(uncertain, nervous, doubtful, vague, changeable) |
| iffy(adjective, uncertain, nervous, doubtful, unsettled) |
| impugnable(doubtful, shaky, risky, unlikely, unpromising) |
| in a quandary(expression, adjective, idiom, uncertain, nervous) |
| in question |
| in suspense |
| incalculable(doubtful, vague, hesitant, changeable, unsure) |
| inconclusive(shaky, unlikely, unpromising) |
| inconstant(doubtful, vague, hesitant, changeable, erratic) |
| indecisive(uncertain, nervous, doubtful, vague, tricky) |
| indefinite(doubtful, shaky, vague, hesitant, changeable) |
| indeterminate(adjective, uncertain, nervous, doubtful, unsettled) |
| indistinct(doubtful, shaky, vague, hesitant, changeable) |
| insecure(adjective, uncertain, nervous, doubtful, unsettled) |
| irregular(doubtful, vague, hesitant, changeable, unsure) |
| irresolute(uncertain, nervous, doubtful, vague, hesitant) |
| lacking(adjective, uncertain, nervous, doubtful, shaky) |
| long shot(expression, doubtful, shaky, risky, unlikely) |