Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: duplicitous  d(y)oo'pli-si-tus
  1. Marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another
    - ambidextrous, deceitful, double-dealing, Janus-faced, two-faced, double-faced, double-tongued

See also: dishonest, dishonorable [US], dishonourable [Brit, Cdn]

Encyclopedia: Duplicitous