duplicitous

adj

1. Given to or marked by deliberate deceptiveness in behavior or speech.

   “It reunites the horribly duplicitous skag-addicted non-heroes of the first movie about twentysomethings trying to get off heroin in Edinburgh, and finding that they have nothing very much to put in its place.”

   “Russia played on those feelings by attacking the French president, Emmanuel Macron[…], saying Moscow still remembered the fate of Napoleon Bonaparte and accusing the French president of duplicitous diplomacy with the Kremlin.”

   ““(chuckles) That duplicitous genius. She's betraying me! She's probably already on Plymeria, subjugating its feeble populace. -Quick, to the shuttle.””