nastolatków

In a sentence

• Grupa nastolatków grała w piłkę na boisku.

  A group of teenagers was playing football on the field.

  The word "nastolatków" is the genitive plural case of "nastolatek", used here to denote a group possessing or involved in an activity on the field.

• Nie znam wszystkich nastolatków mieszkających w moim bloku.

  I don't know all the teenagers living in my apartment building.

  In this sentence, "nastolatków" is used in the genitive plural case, indicating individuals belonging to a larger set.

• Rodzice starali się zrozumieć potrzeby nastolatków.

  The parents were trying to understand the needs of teenagers.

  Here, "nastolatków" is in the genitive plural, integrated within the context of understanding concerns.