| spasmodic(adjective, unstable, irregular, unsettled, unpredictable) |
| unconfident(adjective, nervous, doubtful, worried, hesitant) |
| changeful(adjective, upset, anxious, unstable, irregular) |
| critical(adjective, difficult, delicate, tricky, thorny) |
| false(adjective, unpredictable, fickle, variable, untrustworthy) |
| fluky(adjective, chance, unpredictable, changeable, risky) |
| inexact(adjective, open, rough, loose, error) |
| infirm(adjective, weak, ill, sick, feeble) |
| occasional(adjective, chance, irregular, unreliable, uneven) |
| temperamental(adjective, change, weak, continue, delicate) |
| unconvinced(adjective, nervous, doubtful, hesitant, dubious) |
| unforeseeable(adjective, doubtful, vague, unpredictable, changeable) |
| unmethodical(unreliable, uneven, variable, erratic, random) |
| unsystematic(erratic, random, haphazard) |
| vacillant(hesitant, wavering, indecisive) |
| whimsical(adjective, change, continue, unstable, unsettled) |
| adrift(noun, adjective, loose) |
| aimless(adjective, uncertainty, erratic, random, haphazard) |
| arbitrary(adjective, unusual, irregular, unreliable, changeable) |
| at a loss(expression, idiom, confused, irresolution, puzzled) |