| polygamous(fickle, untrustworthy, unprincipled) |
| quicksilver(fickle, untrustworthy, unprincipled, dirty-dealing) |
| simulated |
| snake in grass(expression, idiom, fickle, untrustworthy, unprincipled) |
| sour |
| stop-at-nothing(fickle, untrustworthy, unprincipled, dirty-dealing) |
| stop at nothing(expression, idiom, fickle, untrustworthy, unprincipled) |
| sub-rosa(fickle, untrustworthy, unprincipled, dirty-dealing) |
| trustless(fickle, untrustworthy, unprincipled) |
| unassured(fickle, untrustworthy, unprincipled) |
| unconverted(fickle, untrustworthy, unprincipled, dirty-dealing) |
| under cover(expression, fickle, untrustworthy, unprincipled, dirty-dealing) |
| underhand(fickle, untrustworthy, unprincipled, dirty-dealing) |
| undutiful(fickle, untrustworthy, unprincipled, dirty-dealing) |
| unethical(fickle, untrustworthy, unprincipled, dirty-dealing) |
| unloyal(fickle, untrustworthy, unprincipled, dirty-dealing) |
| unpatriotic(fickle, untrustworthy, unprincipled, dirty-dealing) |
| unprincipled(fickle, untrustworthy, dirty-dealing) |
| untrusty(fickle, untrustworthy, unprincipled) |
| untruthful(fickle, untrustworthy, unprincipled, dirty-dealing) |