This is the 13000th most frequent German word.
zwickau
"Zwickau" is a proper noun referring to a city in Germany.
In this sentence, "Zwickau" is used as a proper noun, referring to the city of Zwickau in Germany.
Ich komme aus Zwickau.
I come from Zwickau.
Here, "Zwickau" again functions as a proper noun and subject of the sentence, highlighting one of the city’s prominent features.
Zwickau ist bekannt für seine Automobilindustrie.
Zwickau is known for its automobile industry.
Once more, "Zwickau" refers to the geographical location, used to provide information about a characteristic of the city.