This is the 5426th most frequent Korean word.
러시아인이
"러시아인이" means "Russian person" or "a Russian."
러시아인은 refers to Russians as a general group here, followed by the topic marker '은'.
러시아인은 추운 날씨에 익숙해요.
Russians are accustomed to cold weather.
러시아인이 uses the copula '이' before '아니에요', specifying identity negation.
나는 러시아인이 아니에요.
I am not Russian.
러시아인이 combines with '지만', indicating contrast as a Russian individual.