Codependent relationships involve two people: one person who is acting out unhealthy behavior of some kind, and the other who enables their behavior and perceives them as being vulnerable or helpless. The author argues that this relationship dynamic is severely lacking in boundaries, since “as codependents we have a hard time distinguishing our needs from the needs of the other person” (89).

The author uses the term counterdependency to describe people who resist sharing their feelings and opinions with others and are uncomfortable needing help. This can cause people to create rigid boundaries and become unable to enjoy reciprocal friendships and relationships.

Tawwab defines enmeshed relationships as a kind of dynamic between two people who feel that they must maintain their similarities with each other in order for the relationship to continue. The author uses this term to help explain why some friends, partners, and family members find it difficult to set boundaries around their opinions, interests, time, and overall individuality.