| hesitant(adjective, open, weak, gentle, uncertain) |
| provisional(adjective, new, inferior, sensitive, limited) |
| undecided(adjective, open, weak, uncertain, definite) |
| timid(adjective, quiet, weak, uncertain, doubtful) |
| trial(adjective, new, unsettled, experiment, untried) |
| test(adjective, new, unsettled, trial, temporary) |
| indecisive(adjective, open, weak, uncertain, shy) |
| probationary(adjective, new, unsettled, trial, experiment) |
| temporary(adjective, new, unsettled, extra, trial) |
| experimental(adjective, counterfeit, new, near, reserve) |
| uncertain(adjective, open, weak, uncertain, doubtful) |
| humble(adjective, modest, nervous, shy, meek) |
| irresolute(adjective, open, weak, uncertain, nervous) |
| diffident(adjective, quiet, uncertain, modest, shy) |
| speculative(adjective, new, uncertain, doubtful, unsettled) |
| shy(adjective, quiet, uncertain, modest, doubtful) |
| unsure(adjective, open, weak, uncertain, shy) |
| cautious(adjective, uncertain, careful, ambiguous, indefinite) |
| conditional(adjective, uncertain, inferior, sensitive, limited) |
| alternative(extra, alternate, auxiliary, supernumerary) |