This is the 12456th most frequent Russian word.
кирпича
The Russian word "кирпича" means "of the brick" (genitive singular form of "кирпич," which is "brick").
In this sentence, 'кирпича' is in the genitive case, as it indicates a part or quantity of the brick material.
Я взял один кирпич для постройки стены.
I took one brick to build the wall.
Here, 'кирпича' is also in the genitive case but used to describe a fragment, showing partitive usage.
На краю крыши лежал кусок кирпича.
A piece of a brick was lying on the edge of the roof.
In this example, 'кирпича' again appears in the genitive case, denoting a characteristic or attribute related to bricks.