| unconfident(uncertain, nervous, insecure, unsure) |
| unconvinced(nervous, insecure, unsure) |
| undecided(nervous, insecure, unsure) |
| undependable(nervous, insecure, unsure) |
| unpoised(uncertain, nervous, insecure, unsure, unconfident) |
| unreliable(nervous, insecure, unsure) |
| unstable(nervous, insecure, unsure) |
| unsure(uncertain, nervous, insecure, unconfident) |
| untrustworthy(nervous, insecure, unsure) |
| untrusty(nervous, insecure, unsure) |
| up for grabs(expression, idiom, nervous, insecure, unsure) |
| up in the air(expression, idiom, uncertain, nervous, insecure) |
| uptight(uncertain, nervous, insecure, unsure, unconfident) |
| vacillating(nervous, insecure, unsure) |
| vague(uncertain, nervous, insecure, unsure, unconfident) |
| wavering(nervous, insecure, unsure) |
| weak(nervous, insecure, unsure) |
| wimpy(nervous, insecure, unsure) |
| wobbly(nervous, insecure, unsure) |
| worried(uncertain, nervous, insecure, unsure, unconfident) |