| depraved(wrong, immoral, unprincipled) |
| dirty(wrong, immoral, unprincipled) |
| dirty dealing(expression, dishonest, deceitful, fickle, untrustworthy) |
| disloyal(fickle, untrustworthy, unprincipled) |
| disreputable(wrong, immoral, unprincipled) |
| double dealing(expression, immoral, fickle, untrustworthy, unprincipled) |
| extracurricular(fickle, untrustworthy, unprincipled) |
| fair-weather(fickle, untrustworthy, unprincipled) |
| faithless(fickle, untrustworthy, unprincipled) |
| fake(wrong, immoral, unprincipled) |
| falsehearted(fickle, untrustworthy, unprincipled) |
| fickle(untrustworthy, unprincipled) |
| fishy(wrong, immoral, unprincipled) |
| flimflam(wrong, immoral, unprincipled, unethical) |
| fly-by-night(wrong, immoral, unprincipled) |
| fly by night(expression, idiom, fickle, untrustworthy, unprincipled) |
| foresworn(fickle, untrustworthy, unprincipled) |
| fraudulent(dishonest, cunning, deceitful, sneaky, underhanded) |
| furtive(dishonest, cunning, deceitful, sneaky, underhanded) |
| hush-hush(dishonest, cunning, deceitful, sneaky, underhanded) |