This is the 1205th most frequent German word.
moskau
"Moskau" is the German word for "Moscow," the capital city of Russia.
Here, 'Moskau' is used as a proper noun referring to the city of Moscow.
Moskau ist die Hauptstadt von Russland.
Moscow is the capital of Russia.
In this sentence, 'Moskau' indicates the origin of a person, specifying the city they come from.
Ich habe einen Freund, der aus Moskau kommt.
I have a friend who comes from Moscow.
The word 'Moskau' denotes the destination in this context, where the trip is aimed towards the city.