modified
deceiving, deceptive, deluding, double-dealing, shamming, sanctimonious, dissembling, pious, unctuous, unreliable, mealy-mouthed, canting, insincere, double-faced, smooth-tongued, affected, false, caviling, dissimulating, lying, artificial, two-faced, smooth-spoken, spurious, captious, feigning, deceitful, assuming, unnatural, faithless, plausible, pretentious, mannered, Janus-faced, phoney; see also dishonest 1, 2.
Antonyms upright, honest*, sincere.