honorable,
honest worthy of being honored; entitled to honor and respect; "an honorable man"; "led an honorable life"; "honorable service to his country"
corrupt,
crooked lacking in integrity; "humanity they knew to be corrupt...from the day of Adam's creation"; "a corrupt and incompetent city government"
dishonourable,
dishonorable lacking honor or integrity; deserving dishonor; "dishonorable in thought and deed"
false (used especially of persons) not dependable in devotion or affection; unfaithful; "a false friend"; "when lovers prove untrue"
insincere lacking sincerity; "a charming but thoroughly insincere woman"; "their praise was extravagant and insincere"
beguiling misleading by means of pleasant or alluring methods; "taken in by beguiling tales of overnight fortunes"
fraudulent,
deceitful,
fallacious intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice" - S.T.Coleridge; "a fraudulent scheme to escape paying taxes"
misleading,
deceptive,
shoddy designed to deceive or mislead either deliberately or inadvertently; "the deceptive calm in the eye of the storm"; "deliberately deceptive packaging"; "a misleading similarity"; "statistics can be presented in ways that are misleading"; "shoddy business practices"
false (used especially of persons) not dependable in devotion or affection; unfaithful; "a false friend"; "when lovers prove untrue"
picaresque involving clever rogues or adventurers especially as in a type of fiction; "picaresque novels"; "waifs of the picaresque tradition"; "a picaresque hero"
blackguardly,
scoundrelly,
rascally,
roguish lacking principles or scruples; "the rascally rabble"; "the tyranny of a scoundrelly aristocracy" - W.M. Thackaray; "the captain was set adrift by his roguish crew"
Dishonest -
capable of being corrupted; "corruptible judges"; "dishonest politicians"; "a purchasable senator"; "a venal police officer"
