This is the 18143rd most frequent Russian word.
художником
The Russian word "художником" means "artist" (instrumental case).
The word 'художником' is used in the instrumental case to describe the profession of the subject.
Мой брат работает художником, создавая красивые картины.
My brother works as an artist, creating beautiful paintings.
Here, 'художником' is again in the instrumental case, denoting transformation into being an artist.
Он стал художником после окончания художественной школы.
He became an artist after graduating from art school.
In this sentence, 'художником' is in the instrumental case employed in a context expressing an action related to admiration.