Part of speech: Adjective (satellite)
marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another
Example: she was a deceitful scheming little thing"- Israel Zangwill; a double-dealing double agent; a double-faced infernal traitor and schemer"- W.M.Thackeray
Part of speech: Noun
acting in bad faith
Example: deception by pretending to entertain one set of intentions while acting under the influence of another
Double-tongued, Double-dealing, Duplicity, Duplicitous, Janus-faced