This is the 46th most frequent Arabic word.
الروسية
The Arabic word "الروسية" means "Russian" in English.
Here, the word 'الروسية' refers to the language spoken in Russia.
أنا أتعلم اللغة الروسية.
I am learning the Russian language.
In this sentence, 'الروسية' modifies 'العائلة' to indicate that the family is of Russian origin.
العائلة الروسية تسكن بجوارنا.
The Russian family lives next to us.
Here, 'الروسي' as a descriptive form refers to the style or origin of the food being from Russia.