What kind of relationship is characterized by neither person being able to function without the other?

The relationship characterized by neither person being able to function without the other is known as co-dependence. In a co-dependent relationship, individuals often have an unhealthy attachment where one's identity and well-being are heavily reliant on the other person. This dynamic can lead to enabling behaviors, where one person may support the other's unhealthy habits or choices, and it can create a cycle that is difficult to break.

Co-dependence contrasts with independence, where individuals can function on their own without reliance on each other, and interdependence, which highlights a healthy balance of mutual support while maintaining personal autonomy. Dependence suggests reliance but does not necessarily imply the unhealthy dynamics seen in co-dependence. Therefore, co-dependence accurately describes the scenario where both individuals are unable to thrive without the other, pointing to a problematic relational pattern.