| backward(adjective, quiet, gentle, uncertain, modest) |
| cautious(adjective, delicate, uncertain, restrained, modest) |
| distrustful(adjective, uncertain, modest, nervous, humble) |
| erratic(adjective, doubtful, vague, changeable, unsure) |
| groping |
| retiring(adjective, quiet, simple, gentle, modest) |
| shilly-shallying |
| shrinking(adjective, weak, anxious, modest, nervous) |
| unconfident(adjective, uncertain, nervous, doubtful, worried) |
| anxious(adjective, uncertain, awkward, shy, doubtful) |
| changeable(adjective, uncertain, doubtful, vague, indefinite) |
| chary(adjective, delicate, restrained, modest, humble) |
| doubting(adjective, weak, uncertain, shy, doubtful) |
| enigmatic |
| fickle(adjective, weak, uncertain, doubtful, unsure) |
| fluctuating(adjective, weak, uncertain, doubtful, unsure) |
| indefinite(adjective, open, uncertain, doubtful, vague) |
| problematic(uncertain, nervous, doubtful, insecure, unsure) |
| stammering(adjective, uncertain, tentative) |
| stuttering(adjective, uncertain, tentative) |