| weak(adjective, strong, uncertain, nervous, feeble) |
| irresolute(adjective, uncertain, nervous, unstable, irregular) |
| mercurial(adjective, passionate, unstable, irregular, unsettled) |
| questionable(adjective, uncertain, dishonest, doubtful, deceitful) |
| shaky(adjective, uncertain, nervous, unstable, feeble) |
| vacillating(adjective, uncertain, nervous, unstable, irregular) |
| flighty(adjective, careless, excited, unstable, unsettled) |
| shifty(adjective, false, dishonest, deceitful, dubious) |
| untrusty(adjective, false, uncertain, nervous, dishonest) |
| fluctuating(adjective, unstable, irregular, unsettled, unpredictable) |
| indecisive(adjective, uncertain, nervous, unstable, doubtful) |
| mutable(adjective, unstable, unsettled, fickle, variable) |
| temperamental(adjective, unpredictable, unreliable, erratic, moody) |
| tricky(adjective, difficult, delicate, false, awkward) |
| unassured(adjective, uncertain, nervous, dishonest, doubtful) |
| unsafe(adjective, dishonest, deceitful, unpredictable, unreliable) |
| faithless(adjective, false, dishonest, deceitful, unreliable) |
| fallible(adjective, unpredictable, unreliable, fickle, variable) |
| impulsive(adjective, unstable, irregular, unsettled, unpredictable) |
| irregular(adjective, unstable, unsettled, unpredictable, unreliable) |