большая

большая

Big; large.

The word 'большая' is the feminine singular form of the adjective 'большой', agreeing with the feminine noun 'собака' to describe its size.

У неё большая собака.

She has a big dog.

Here, 'большая' describes the noun 'ответственность' (responsibility), which is also feminine singular, emphasizing the magnitude or seriousness.

Это большая ответственность.

This is a big responsibility.

In this instance, 'большая' modifies 'книга' (book), again matching its gender and number, to describe its physical size.

На столе лежала большая книга.

A large book was lying on the table.