This is the 4447th most frequent German word.
jüngerer
"Jüngerer" means "younger" (comparative form, referring to a male person).
The word 'jüngerer' is used here as an adjective to compare the age of siblings.
Mein jüngerer Bruder ist sehr sportlich.
My younger brother is very athletic.
Here, 'jüngeren' is applied as an adjective to describe a subgroup by age within a group.
Die jüngeren Mitglieder der Gruppe bevorzugen moderne Musik.
The younger members of the group prefer modern music.
In this sentence, 'jüngerer' serves as a descriptor for the novelty or timing aspect of the subject.