Akademik

double-dealing
I
noun
acting in bad faith; deception by pretending to entertain one set of intentions while acting under the influence of another
Syn: ↑duplicity
Derivationally related forms: ↑duplicitous (for: ↑duplicity)
Hypernyms: ↑deception, ↑deceit, ↑dissembling, ↑dissimulation
II
adjective
marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another
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"she was a deceitful scheming little thing"- Israel Zangwill

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a double-dealing double agent

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"a double-faced infernal traitor and schemer"- W.M.Thackeray

Syn:
ambidextrous, ↑deceitful, ↑duplicitous, ↑Janus-faced, ↑two-faced, ↑double-faced, ↑double-tongued
Similar to: ↑dishonest, ↑dishonorable
Derivationally related forms: ↑duplicity (for: ↑duplicitous), ↑deceitfulness (for: ↑deceitful)

Useful english dictionary. 2012.