Most of what I can say well, I did here:

https://medium.com/@myartman/list/attachmentcodependence-aa3f4ef3f406

I primarily understand it as an addiction based on how it has shown up clinically, and how I treated it. My only other understanding is based on its being a developmental disorder vis-a-vis attachment. I don't know how to expand on that, but I will consider the challenge.