This is the 14881st most frequent German word.
reifer
Comparative form of "reifen," meaning "riper" or "more mature."
Here, 'reifer' is the comparative form of 'reif', used to compare the ripeness of two fruits.
Die Banane ist reifer als der Apfel.
The banana is riper than the apple.
In this sentence, 'reifer' is used in its figurative sense, indicating increased maturity in the students.
Dieses Jahr sind die Schüler deutlich reifer geworden.
This year, the students have become significantly more mature.
Here, 'reifer' refers to cheese that has been allowed to age, enhancing its taste.