| wishy-washy(adjective, open, weak, uncertain, unstable) |
| apprehensive(adjective, uncertain, anxious, awkward, nervous) |
| awkward |
| cautious |
| clouded(adjective, clear, obscure, certain, uncertain) |
| dickey(adjective, unreliable, insecure, treacherous, incalculable) |
| dubitable(adjective, clear, obscure, certain, uncertain) |
| faint(adjective, unsettled, unclear, indistinct, indistinguishable) |
| fainthearted |
| fluctuant(adjective, weak, uncertain, nervous, unstable) |
| groping |
| hairy(noun, adjective, delicate, uncertain, unstable) |
| in doubt(expression, adjective, idiom, clear, open) |
| inconclusive(adjective, clear, poor, certain, uncertain) |
| inconstant(adjective, loose, doubtful, vague, hesitant) |
| inhibited(adjective, feel doubt) |
| introverted(adjective, feel doubt) |
| jumpy(adjective, uncertain, nervous, insecure, self-doubting) |
| on thin ice(expression, adjective, idiom, delicate, uncertain) |
| problematical(adjective, clear, certain, ambiguous) |