| flickering(adjective, irregular, changeable, variable) |
| flimsy(adjective, weak, delicate, uncertain, ill) |
| fly-by-night(adjective, uncertain, nervous, doubtful, insecure) |
| gaga(adjective, careless, silly, unsteady, inconstant) |
| incalculable(doubtful, vague, hesitant, changeable, unsure) |
| inept(adjective, uncertain, awkward, hesitant, clumsy) |
| invertebrate |
| lukewarm(adjective, indifferent, unenthusiastic) |
| mobile(adjective, unstable, unsettled, unpredictable, unreliable) |
| moot |
| neutral |
| open(adjective, uncertain, nervous, doubtful, insecure) |
| powerless(adjective, uncertain, unstable, feeble, hesitant) |
| problematic(adjective, uncertain, nervous, doubtful, insecure) |
| protean(adjective, unstable, unsettled, changeable, variable) |
| puny(adjective, weak, delicate, uncertain, feeble) |
| pusillanimous(weak, nervous, shy, feeble, fearful) |
| questionable(adjective, doubtful, vague, hesitant, changeable) |
| retiring(nervous, shy, fearful) |
| roving(anxious, unsettled, restless, uneasy, unruly) |