(a.) Devoid of truth; dishonest; dishonest; spurious; faithless.

Machiavellian ambidextrous amoral artful bent casuistic cheating conscienceless corrupt corrupted counterfeit crafty criminal cronk crooked cunning dark deceitful deceiving deceptive defrauding devious dishonorable disingenuous double double-dealing double-faced double-minded double-tongued doublehearted doubtful dubious duplicitous empty equivocal evasive faithless fake FALSE false-principled falsehearted felonious fishy forsworn fraudulent furtive hollow hypocritical ill-got ill-gotten immoral indirect insidious insincere jesuitic knavish lying mealymouthed mendacious not kosher oblique perfidious perjured prevaricating questionable roguish rotten shady shameless shifty sinister slippery snide suspicious swindling thieving thievish tongue in cheek treacherous tricky truthless two-faced uncandid unconscienced unconscientious unconscionable underhand underhanded unethical unfair unfrank unprincipled unsavory unscrupulous unserious unstraightforward untrustworthy untruthful unveracious without remorse without shame