편입생이 · 편입생을
transfer student (into a college)
Example
올해 우리 학과에 편입생이 다섯 명 들어왔어요.
Five transfer students joined our department this year.
Word parts
편 compile+입 enter+생 student
Literally 'student entered into the roster'.
Good to know
편입생 is used for college transfers; for elementary through high school, say 전학생.