| negative(adjective, person, uncertain, cynical, shameless) |
| open(adjective, uncertain, nervous, unstable, unsettled) |
| sceptical |
| unbelievable(adjective, great, extraordinary, unreasonable, fantastic) |
| wavering(adjective, open, weak, uncertain, nervous) |
| unstable(adjective, weak, delicate, uncertain, nervous) |
| queer(adjective, unusual, strange, fantastic, odd) |
| speculative(adjective, uncertain, vague, unclear, interested) |
| tentative(adjective, open, weak, uncertain, shy) |
| tricky(noun, adjective, weak, delicate, uncertain) |
| uneasy(adjective, open, uncertain, anxious, awkward) |
| dicey(noun, adjective, open, obscure, delicate) |
| diffident(adjective, uncertain, nervous, shy, hesitant) |
| conjectural(adjective, vague, unsure, imaginary, theoretical) |
| cynical(adjective, person, uncertain, negative, hesitant) |
| doubtable(adjective, open, obscure, uncertain, shaky) |
| leery |
| pessimistic(adjective, person, uncertain, negative, cynical) |
| questioning(adjective, uncertain, nervous, careful, hesitant) |
| shy(adjective, slow, uncertain, awkward, hesitant) |