| unlikely(uncertain, doubtful, unsure) |
| unpredictable(adjective, loose, unreliable, variable, irresponsible) |
| unserviceable(adjective, unreliable, insecure, treacherous, incalculable) |
| unsound(adjective, loose, unpredictable, unreliable, variable) |
| unstable(adjective, loose, unpredictable, unreliable, variable) |
| unsteady(adjective, unreliable, insecure, treacherous, incalculable) |
| untrue(adjective, false, dishonest, deceitful, unreliable) |
| untrusty(adjective, false, uncertain, dishonest, doubtful) |
| unworthy(adjective, unreliable) |
| wavering(uncertain, doubtful, unsure) |
| wonky(adjective, unreliable, insecure, treacherous, incalculable) |
| adulterine(fickle, untrustworthy, unprincipled) |
| adulterous(fickle, untrustworthy, unprincipled) |
| amoral(fickle, untrustworthy, unprincipled) |
| barratrous |
| bigamous(fickle, untrustworthy, unprincipled) |
| bum(loose, unpredictable, unreliable, rotten, variable) |
| careless(loose, unpredictable, unreliable, variable, irresponsible) |
| changeable(loose, unpredictable, unreliable, variable, irresponsible) |
| changeful(fickle, untrustworthy, unprincipled) |