dishonestThe press called out the campaign's dishonest tactics.
untrustworthyHe made the mistake of basing his news story on an untrustworthy source.
deviousIt was a devious plan - but would it work?
deceitfuldisapprovingShe's deeply deceitful and not to be trusted.
disingenuousformalIt's a little disingenuous to claim that you didn't know about the meeting when we were all sent the reminder via email.
duplicitousformalCustomers lose confidence in all banks when one engages in duplicitous behaviour.
corruptCorrupt politicians caught accepting bribes from political lobbies were removed from their posts this week.
unscrupulousdisapprovingThis city is full of unscrupulous developers who con struggling homeowners into selling off valuable property at a fraction of its worth.
crookedinformalHe was a crooked politician and I'm glad the reporters caught him out.
bentUKslangHe's a bent copper.