This is the 505th most frequent Russian word.
беларусь
"Беларусь" means "Belarus," a country in Eastern Europe.
In this sentence, 'Беларуси' is used in the genitive case to indicate possession, specifically that Minsk belongs to Belarus.
Минск — столица Беларуси.
Minsk is the capital of Belarus.
Here, 'Беларусь' is in the nominative case, serving as the subject of the sentence.
Беларусь славится своими традициями.
Belarus is famous for its traditions.
In this sentence, 'Беларуси' is used in the prepositional case, indicating the location or state associated with Belarus.