"Дательный" is a grammatical case in the Russian language that indicates the indirect object of a sentence. It answers the questions "кому?" (to whom?) or "чему?" (to what?). This case is used to show the recipient of an action, such as giving or telling. For example, in the sentence "Я даю книгу другу" (I give a book to a friend), "другу" is in the дательный case. In Russian, nouns, pronouns, and adjectives change their endings to reflect the дательный case. For masculine nouns, the ending often changes to "-у" or "-ю," while feminine nouns typically change to "-е" or "-и." Understanding the дательный case is essential for proper sentence structure and communication in Russian.