| inconceivable(adjective, extraordinary, unreasonable, amazing, doubtful) |
| perplexed(adjective, uncertain, doubtful, hesitant, unsure) |
| speculative(uncertain, doubtful, vague, unclear, unsure) |
| tricky(adjective, weak, delicate, loose, uncertain) |
| unassured(adjective, uncertain, nervous, dishonest, doubtful) |
| unbelieving(adjective, false, uncertain, dishonest, doubtful) |
| unconvincing(adjective, great, extraordinary, unreasonable, amazing) |
| unresolved(adjective, open, uncertain, doubtful, unsettled) |
| unscrupulous |
| unsound(adjective, false, loose, uncertain, unpredictable) |
| unthinkable(adjective, extraordinary, amazing, incredible) |
| vacillating(adjective, uncertain, nervous, doubtful, unsettled) |
| weak(adjective, great, extraordinary, uncertain, nervous) |
| ambivalent(open, doubtful, vague, unsure, ambiguous) |
| apocryphal(adjective, fake, uncertain, doubtful, questionable) |
| controvertible |
| crazy(adjective, unusual, strange, ridiculous, unexpected) |
| cryptic(uncertain, dishonest, doubtful, vague, unreliable) |
| deceptive(adjective, dishonest, unpredictable, unreliable, fickle) |
| disbelieving(adjective, uncertain, hesitant, suspicious, wary) |