This is the 8959th most frequent Russian word.
разговорного
"Разговорного" means "colloquial" or "conversational."
Here 'разговорного' is used as an adjective to describe 'языка', emphasizing informal or everyday speech.
Его стиль письма отличается использованием разговорного языка.
His writing style is characterized by the use of colloquial language.
In this case, 'разговорного' modifies 'стиля', highlighting an informal style typical for everyday speech.
Я изучаю особенности разговорного стиля в литературе.
I am studying the features of the colloquial style in literature.
Here, 'разговорного' relates to 'синтаксиса', referring to the syntactical structures often found in casual, conversational language.