This is the 3952nd most frequent Russian word.
екатеринбург
Yekaterinburg: A major city in Russia, located on the eastern side of the Ural Mountains.
Here, 'Екатеринбург' is used as a proper noun referring to a city.
Екатеринбург — это крупный город в России.
Yekaterinburg is a major city in Russia.
In this sentence, 'Екатеринбург' is used to specify the location traversed during travel.
Я путешествовал через Екатеринбург во время отпуска.
I traveled through Yekaterinburg during my vacation.
In this instance, 'Екатеринбург' refers to the city in the context of its economic structure.