| unhealthy(adjective, delicate, uncertain, sensitive, unstable) |
| unpredictable(adjective, doubtful, vague, uneven, untrustworthy) |
| chancy(adjective, delicate, uncertain, sensitive, unstable) |
| changeable(adjective, uncertain, doubtful, vague, uneven) |
| dickey(adjective, unreliable, treacherous, incalculable) |
| jealous |
| paranoid |
| retiring(adjective, feel doubt) |
| self-conscious(adjective, feel doubt) |
| speculative(adjective, delicate, uncertain, sensitive, doubtful) |
| ticklish(adjective, upset, delicate, uncertain, anxious) |
| timorous(adjective, uncertain, unstable, shy, hesitant) |
| troubled(adjective, upset, uncertain, awkward, unsettled) |
| undecided(adjective, open, uncertain, nervous, doubtful) |
| undependable(adjective, uncertain, nervous, unstable, doubtful) |
| uneasy(adjective, upset, awkward, shy, doubtful) |
| uptight(adjective, informal, uncertain, nervous, worried) |
| vague(adjective, uncertain, nervous, doubtful, worried) |
| wonky(adjective, unreliable, treacherous, incalculable) |
| ambivalent(adjective, uncertain, doubtful, vague, unsure) |