| unrespectable(adjective, careless, inferior, dishonest, shameful) |
| wicked(adjective, wrong, dirty, corrupt, foul) |
| artful(adjective, dishonest, deceitful, tricky, sly) |
| crepuscular(adjective, dull, obscure, dark, gloomy) |
| cunning(adjective, smooth, false, dishonest, deceitful) |
| debatable(adjective, uncertain, doubtful, shaky, dubious) |
| dirty(adjective, bad, wrong, nasty, cruel) |
| discreditable(adjective, careless, inferior, vile, shameful) |
| foxy(adjective, dishonest, deceitful, dubious, suspicious) |
| guileful(adjective, smooth, false, dishonest, cunning) |
| indefinite(uncertain, doubtful, shaky, dubious, unlikely) |
| inglorious(adjective, nasty, careless, shameful, suspicious) |
| insidious(adjective, dishonest, cunning, deceitful, dubious) |
| mysterious(adjective, unusual, strange, uncertain, doubtful) |
| nebulous(adjective, dull, dark, gloomy, dim) |
| not kosher(expression, dubious, suspect) |
| opaque(adjective, dull, dark, gloomy, dim) |
| peculiar(adjective, unusual, strange, dubious, suspect) |
| perfidious(adjective, false, dishonest, immoral, deceitful) |
| problematic(adjective, uncertain, doubtful, unsettled, shaky) |