This is the 6162nd most frequent Polish word.
aurelien
The word "aurelien" is not a Polish term; it appears to be a French name or word. If you have further clarification, I can assist accordingly.
Personal name used as a subject.
Aurelien studiował literaturę francuską na uniwersytecie.
Aurelien studied French literature at the university.
Used as a proper noun within a relative clause.
Moim sąsiadem jest Aurelien, który pochodzi z Francji.
My neighbor is Aurelien, who comes from France.
Used as the subject performing an action.