This is the 14297th most frequent German word.
hinzuerfundene
"Invented additionally" or "added-invented."
Here, 'hinzuerfundene' is used as an adjective describing the narratives, highlighting that they are invented or fictional.
Die Geschichten in dem Buch sind hinzuerfundene Erzählungen.
The stories in the book are made-up narratives.
'Hinzuerfundene' is used to describe the characters, indicating they are created additionally, not originally part of the main content.
Einige hinzuerfundene Charaktere wurden der Serie hinzugefügt.
Some made-up characters were added to the series.
In this context, 'hinzuerfundene' qualifies the idea as newly created for the purpose of adding input to the discussion.