This is the 3333rd most frequent Russian word.
писатель
Writer.
Here, "писатель" is used to refer to an author, indicating a person specifically as one who writes books.
Этот писатель написал много известных книг.
This writer has written many famous books.
In this sentence, "писатель" describes someone who is starting to write professionally, highlighting the early stage of their role as an author.
Молодой писатель только начинает свою карьеру.
The young writer is just beginning his career.
Here, "писателем" is in instrumental case and implies an individual's identification with the profession or role of a writer, rather than their achievements.