Synset

marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another
<adj.all>

Janus-faced

ambidextrous

deceitful

double-dealing

double-faced

double-tongued

duplicitous

two-faced

sample sentences

"she was a deceitful scheming little thing"- Israel Zangwill
"a double-dealing double agent"
"a double-faced infernal traitor and schemer"- W.M.Thackeray