الروسية

In a sentence

• أنا أتعلم اللغة الروسية.

  I am learning the Russian language.

  Here, the word 'الروسية' refers to the language spoken in Russia.

• العائلة الروسية تسكن بجوارنا.

  The Russian family lives next to us.

  In this sentence, 'الروسية' modifies 'العائلة' to indicate that the family is of Russian origin.

• الطعام الروسي في المطعم لذيذ جداً.

  The Russian food at the restaurant is very delicious.

  Here, 'الروسي' as a descriptive form refers to the style or origin of the food being from Russia.