This is the 446th most frequent Armenian word.
ռուս
The Armenian word "ռուս" means "Russian" in English.
Here, the word 'ռուս' is part of 'ռուսերեն', a derivation meaning the Russian language.
Ես խոսում եմ ռուսերեն։
I speak Russian.
In this sentence, 'ռուս' is used as a noun to denote a person of Russian nationality.
Նրա ազգությունը ռուս է։
Their nationality is Russian.
Here, 'ռուս' is used as an adjective describing 'տուրիստները' (tourists) as being Russian.