This is the 1432nd most frequent Russian word.
дружбы
The Russian word "дружбы" means "friendship."
In this sentence, "дружбы" refers to the noun "friendship" in the genitive case, as it is describing the relationship belonging to 'our' or "нашей."
Истории нашей дружбы уже много лет.
The story of our friendship is many years old.
Here, "дружбы" is in the genitive case to denote possession, specifying the bonds related to friendship.
Мы укрепили наши узы дружбы.
We strengthened our bonds of friendship.
In this context, "дружбы" is used in the genitive case following the preposition "о," which governs the genitive when discussing topics or subjects.