This is the 4054th most frequent Russian word.
мордовии
"Mордовии" is the genitive or prepositional case of "Мордовия," which means "Mordovia," a republic in Russia.
The word 'Мордовии' is in the prepositional case, used with the preposition 'в' to indicate the location where the action took place.
Я побывал в Мордовии этим летом.
I visited Mordovia this summer.
Here, 'Мордовии' is in the genitive case, showing possession or relation to the culture being described.
Культура Мордовии впечатляет своей уникальностью.
The culture of Mordovia impresses with its uniqueness.
The word 'Мордовии' is in the prepositional case, paired with 'о' to denote the topic of discussion.