| changeable(adjective, uncertain, doubtful, hesitant, indefinite) |
| circumspect(adjective, careful, vague, prudent, ambiguous) |
| guarded(adjective, careful, vague, prudent, restricted) |
| halting(adjective, weak, uncertain, shy, doubtful) |
| interim |
| precarious(adjective, uncertain, doubtful, vague, unsure) |
| reluctant(adjective, uncertain, indefinite) |
| spineless(adjective, nervous, shy, fearful, irresolute) |
| substitute(adjective, extra, alternative, alternate, auxiliary) |
| unresolved(adjective, uncertain, doubtful, hesitant, dubious) |
| unsettled(adjective, open, weak, uncertain, doubtful) |
| vague(adjective, uncertain, careful, ambiguous, equivocal) |
| volatile(adjective, hesitant, wavering, indecisive, irresolute) |
| essay |
| experiment |
| shifty(adjective, irresolute) |
| unverified(adjective, experiment, experimental) |
| acting(adjective, unsettled, extra, auxiliary, speculative) |
| dillydallying(adjective, irresolute) |
| erratic(adjective, doubtful, vague, unsure, irresolute) |