noun-modifying (irregular)
Literary or formal prenominal form of 素晴らしい, used before nouns to express admiration or praise. Often found in set phrases, titles, or poetic language.
素晴らしき世界を旅したい。
I want to travel through this wonderful world.
彼は素晴らしき才能の持ち主だ。
He is a person of magnificent talent.