Belonging is a strong and inevitable feeling that exists in human nature. To belong or not to belong can occur due to choices of one's self, or the choices of others. Not everyone has the same life and interests, hence not everyone belongs to the same thing or person.
Search the Internet with Kids.Net.Au. Definition of unification. the act of making or becoming a single unit; the union of opposing factions; he looked forward to the unification of his family for the holidays. an occurrence that involves the production of a union.
In those families having more than one child, the parent sometimes singles-out one of the children (the golden child) and focuses those (emotionally abusive) behaviors upon them. Your definition of parentification could be a form of emotional dependency in some situations involving parents with personality disorders. Some PD's are characterized by emotional dysregulation thereby making this an extremely complex set of dynamics to deconstruct - especially in a broad, general sense.