Codependency (noun)

1. A psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (such as an addiction to alcohol or heroin).
2. A behavioral condition in which an individual is dependent on another person and feels the need to control them.

Origin:

Co- + dependency.

Examples:

1. The codependency between the drug addict and the enabler was apparent to everyone who knew them.
2. The therapist recognized the codependency in the couple's relationship and worked to help them both break free from it.
3. He realized that his codependency on her was causing him to neglect his own needs and goals.
4. She had to end the codependency relationship with her alcoholic mother to take control of her own life.
5. The group therapy sessions helped him to understand his codependency on his partner and learn how to set healthy boundaries.