This is the 814th most frequent German word.
zürich
"Zürich" is not a German word but a proper noun that refers to the largest city in Switzerland.
In this sentence, 'Zürich' is used as a proper noun to denote a specific city.
Zürich ist eine große Stadt in der Schweiz.
Zürich is a large city in Switzerland.
Here, 'Zürich' is used as a destination in the context of travel.
Ich werde nächste Woche nach Zürich reisen.
I will travel to Zurich next week.
In this example, 'Zürich' indicates the location of the university.