| shy(adjective, state, behavior, courage, characteristic) |
| uncertain(adjective, characteristic, quality, weak, doubt) |
| unsure(adjective, characteristic, quality, weak, doubt) |
| doubtful(adjective, characteristic, quality, weak, doubt) |
| insecure(adjective, characteristic, quality, doubt, uncertainty) |
| timid(adjective, characteristic, quality, strong, weak) |
| pessimistic(adjective, characteristic, quality, weak, feelings) |
| dubious(adjective, characteristic, quality, doubt, uncertainty) |
| afraid(adjective, characteristic, calm, quality, weak) |
| jumpy(adjective, characteristic, quality, doubt, uncertainty) |
| nervous(adjective, characteristic, calm, quality, cool) |
| scared(adjective, characteristic, quality, doubt, uncertainty) |
| diffident(adjective, characteristic, quality, doubt, uncertainty) |
| mousy(adjective, characteristic, quality, doubt, uncertainty) |
| unassuming(adjective, characteristic, quality, doubt, uncertainty) |
| demure(adjective, characteristic, quality, doubt, uncertainty) |
| cowardly(adjective, characteristic, quality, weak, doubt) |
| lacking confidence(expression, adjective, characteristic, quality, doubt) |
| not sure(expression, adjective, characteristic, quality, doubt) |
| humble(adjective, characteristic, quality, doubt, uncertainty) |