This is the 4153rd most frequent Russian word.
русского
"Русского" means "Russian" (related to the Russian language or a Russian person).
Displaying an animate masculine singular noun in the accusative case indicating direct object of a sentence.
Я встретил русского друга вчера.
I met my Russian friend yesterday.
Describing the genitive case of the Russian language noun to indicate its object in the sentence.
Я учу русского языка.
I am learning Russian language.
Illustrating possessive genitive case referring to a Russian writer.