This is the 4220th most frequent German word.
betreffenden
"Betreffenden" means "concerned" or "relevant."
In this sentence, 'betreffenden' is used as an adjective meaning 'relevant' or 'concerned' to specify the documents being discussed.
Die betreffenden Dokumente wurden gestern abgeholt.
The relevant documents were picked up yesterday.
Here, 'betreffenden' modifies 'Themen' to indicate the topics that are relevant to the context of the discussion.
Die betreffenden Themen werden morgen in der Besprechung behandelt.
The concerned topics will be discussed in the meeting tomorrow.
In this example, 'betreffenden' refers to 'Person', indicating the particular person being referred to in the context.