| indefinite(adjective, open, obscure, uncertain, doubtful) |
| indeterminate(adjective, clear, certain, uncertain, doubtful) |
| tentative(adjective, open, weak, uncertain, shy) |
| volatile(adjective, unstable, unsettled, hesitant, fickle) |
| capricious(adjective, unstable, unsettled, erratic, frivolous) |
| dubious(adjective, clear, open, delicate, certain) |
| borderline(adjective, clear, open, delicate, certain) |
| impulsive(adjective, unstable, unsettled, fickle, variable) |
| inconstant(adjective, unstable, doubtful, unsettled, vague) |
| undetermined(adjective, open, weak, uncertainty, uncertain) |
| unresolved(adjective, open, uncertain, doubtful, unsettled) |
| chancy(adjective, clear, delicate, certain, uncertain) |
| cowardly(adjective, weak, uncertain, unstable, feeble) |
| equivocal(adjective, clear, open, delicate, certain) |
| fluctuating(adjective, weak, uncertain, unstable, doubtful) |
| unreliable(adjective, delicate, uncertain, nervous, unstable) |
| erratic(adjective, unstable, doubtful, unsettled, vague) |
| flighty(adjective, unstable, unsettled, fickle, erratic) |
| halting(adjective, weak, uncertain, shy, doubtful) |
| of two minds(expression, adjective, idiom, open, uncertain) |