Manipulative (adjective)

1. Tending to manipulate or control others for one's own gain or advantage.
2. Skilled or adept at manipulating or influencing others or situations.

Origin:

From the verb manipulate, from french manipuler, from latin manipulus ("a handful"), from manus ("hand") + -pulus ("-ful").

Examples:

1. He was a manipulative politician who always put his own interests first.
2. She was a manipulative woman who knew how to get what she wanted.
3. The manipulative advertising campaign was designed to appeal to people's emotions.
4. The manipulative businessman had a talent for making people believe his lies.
5. The manipulative teacher was always playing favorites.