definition of
deceitful

[1] #1 deceitful s. [fallacious, fraudulent] intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice" - S.T.Coleridge; "a fraudulent scheme to escape paying taxes". wn

[2] #2 deceitful s. [ambidextrous, double-dealing, duplicitous, Janus-faced, two-faced, double-faced, double-tongued] 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"- Israel Zangwill; "a double-dealing double agent"; "a double-faced infernal traitor and. wn