unreliable undependable dodgy irresponsible uncertain unsafe untrustworthy dishonest irresolute unfaithful deceitful duplicitous crooked fraudulent underhand deceptive treacherous unscrupulous shady devious tricky false guileful shifty cunning crafty wily sneaky unprincipled dishonorable dishonourable underhanded insincere slippery lying unethical bent designing perfidious corrupt disreputable sharp unfair dirty untruthful cheating illegal misleading deceiving traitorous subtle mendacious criminal immoral rogue fast knavish unlawful unctuous swindling sneaking unjust villainous recreant defrauding rascally indecisive amoral doubtful tentative slim vacillating wavering hesitant roguish undecided truthless hesitating infirm unsteady fickle nervous hoodwinking equivocating teetering ambivalent divided dithering elusive faltering unsettled sinister fluctuating unresolved undetermined uncommitted torn unsure iffy untrusted