| vague(adjective, doubtful, hesitant, changeable, unsure) |
| wayward(adjective, careless, unstable, unreasonable, irregular) |
| convertible(adjective, unstable, unsettled, changeable, variable) |
| eccentric(adjective, uncertain, irregular, unpredictable, unreliable) |
| evanescent |
| jerky(adjective, irregular, unreliable, uneven, variable) |
| mobile(adjective, upset, lively, active, anxious) |
| moody(adjective, careless, unstable, unreasonable, unpredictable) |
| perfidious(adjective, false, dishonest, immoral, rotten) |
| quicksilver(lively, unpredictable, changeable, fickle, untrustworthy) |
| recreant(adjective, false, dishonest, unsound, untrue) |
| shifty(adjective, weak, false, uncertain, unpredictable) |
| skittish(adjective, unstable, unsettled, variable, unsteady) |
| slippery(adjective, weak, uncertain, sensitive, doubtful) |
| temporary |
| undecided(adjective, doubtful, vague, hesitant, unsure) |
| untrustworthy(adjective, false, dishonest, immoral, dubious) |
| wanton(adjective, free, careless, wild, reckless) |
| wishy-washy |
| wobbly(adjective, weak, uncertain, unstable, doubtful) |