| unscrupulous(adjective, immoral) |
| unsteady(adjective, unreliable, insecure, treacherous, incalculable) |
| ambivalent(adjective, uncertain, doubtful, vague, hesitant) |
| conjectural(adjective, doubtful, vague, hesitant, changeable) |
| crooked(adjective, false, corrupt, dishonest, immoral) |
| deniable(adjective, uncertain) |
| devious(adjective, evil, false, corrupt, dishonest) |
| dishonorable(adjective, evil, corrupt, dishonest, crooked) |
| hazardous(adjective, shaky, unlikely, unpromising) |
| inconceivable(adjective, extraordinary, amazing, doubtful, dubious) |
| infamous(adjective, dishonest, shameful, crooked, dishonorable) |
| open to question(expression, adjective, idiom, uncertain, doubtful) |
| opprobrious(adjective, dubious, dishonorable, disreputable, infamous) |
| treacherous(adjective, corrupt, dishonest, deceitful, unpredictable) |
| trustless(adjective, uncertain, dishonest, doubtful, deceitful) |
| unpredictable(adjective, uncertain, doubtful, vague, hesitant) |
| absurd(adjective, doubtful, dubious, unbelievable, implausible) |
| alleged(supposed, unproven) |
| at issue(adjective, idiom, clear, certain) |
| chancy(adjective, clear, certain, uncertain, doubtful) |