This is the 239th most frequent German word.
nächste
"Next"
The word 'nächste' here functions as an attributive adjective modifying the noun 'Haltestelle', indicating the subsequent stop in a sequence.
Ich steige an der nächsten Haltestelle aus.
I am getting off at the next stop.
Here, 'nächste' is used before 'Kapitel', specifying the chapter that comes directly after the current one.
Das nächste Kapitel des Buchs ist sehr spannend.
The next chapter of the book is very exciting.
In this case, 'nächste' is applied to 'Woche', denoting the week following the current one.