This is the 102nd most frequent Romanian word.
rus
The Romanian word "rus" means "Russian" in English.
Here, 'rus' is used as an adjective to describe nationality, indicating the teacher is from Russia.
Am cunoscut ieri un profesor rus.
Yesterday, I met a Russian teacher.
In this context, 'rus' again functions as an adjective, describing the type of cuisine or style associated with Russia.
Mergem la restaurantul rus din oraș.
We are going to the Russian restaurant in the city.
Here, 'rusul' serves as a noun by itself due to the definite article attached to it, referring to a Russian individual (a man).