Duplicitous (adjective)

1. Characterized by duplicity; marked by deliberate deception; double-dealing.
2. Having two meanings, especially when one is hidden.

Origin:

From late latin duplicitus, from latin duplicitas ("double-mindedness, duplicity"), from duplex ("double") + -icitas ("-ness").

Examples:

1. The duplicitous politician promised one thing to one group and the opposite to another.
2. The company's duplicitous advertising campaign led to a lawsuit.
3. The salesman was fired for his duplicitous sales tactics.
4. I couldn't trust my ex-boyfriend because of his duplicitous behavior.
5. The duplicitous nature of the criminal's actions made it difficult for the police to catch him.