This is the 13629th most frequent Korean word.
루스는
"루스는" is not a standalone word. It appears to be a phrase or part of a sentence in Korean, meaning "Rus is" or "as for Rus," depending on context.
Here, '루스는' highlights Ruth as the actor performing the action of reading a book.
루스는 책을 읽고 있어요.
Ruth is reading a book.
'루스는' in this context specifies Ruth as the learner of the Korean language.
루스는 한국어를 배워요.
Ruth learns Korean.
In this sentence, '루스는' introduces the subject, 'Ruth', indicating her topic as the student being discussed.