unscrupulous
I
adjective
base, conscienceless, corrupt, crooked, deceitful, dishonest, dishonorable, disingenuous, faithless, false, fraudulent, immoral, inequitable, iniquitous, lawless, perfidious, profligate, questionable, roguish, ruthless, shifty, sly, treacherous, two-faced, underhand, unethical, unfair, unjust, unlawful, unprincipled, unrestrained, vicious, villainous, wanton, wicked, without integrity, without scruples, wrongful
II
index
arrant (onerous), delinquent (guilty of a misdeed), depraved, diabolic, dishonest, disingenuous, disreputable, faithless, false (disloyal), fraudulent, immoral, insidious, lawless, machiavellian, peccant (culpable), perfidious, recreant, sly, tortuous (corrupt), unconscionable, unethical
Burton's Legal Thesaurus.
William C. Burton.
2006