الروسي

In a sentence

• هذا الكتاب الروسي مثير للاهتمام.

  This Russian book is interesting.

  In this sentence, 'الروسي' functions as an adjective describing the noun 'الكتاب' (book), meaning that the book is Russian in origin or context.

• الرجل الروسي يتحدث العربية بطلاقة.

  The Russian man speaks Arabic fluently.

  Here, 'الروسي' is an adjective modifying the noun 'الرجل' (man), indicating the nationality or ethnicity of the man being described.

• اللغة الروسية معقدة لكنها جميلة.

  The Russian language is complex but beautiful.

  In this sentence, 'الروسية' is the feminine adjective form tied to the noun 'اللغة' (language), specifying it as the Russian language.