deceitful

Dictionary definition · deceitful

adjective

involving deception"deceitful advertising"
marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another"she was a deceitful scheming little thing"

Similar words

fallacious fraudulent Janus-faced ambidextrous double-dealing double-faced double-tongued duplicitous two-faced

Source: Open English WordNet (CC BY 4.0).