This is the 1540th most frequent German word.
einzelnen
"Einzelnen" means "individual" or "single" in English.
The word 'einzelnen' is used as an adjective describing 'Bücher', emphasizing the individuality of each book.
Ich habe die einzelnen Bücher auf dem Tisch sortiert.
I sorted the individual books on the table.
The word 'einzelnen' is used as an adjective for 'Teilnehmer', highlighting the individuality of each participant's opinion.
Die Meinungen der einzelnen Teilnehmer waren sehr unterschiedlich.
The opinions of the individual participants were very different.
The word 'einzelnen' is used to describe 'Aspekt', pointing out that each aspect of the problem needs individual attention.