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.
I want to travel through this wonderful world.
He is a person of magnificent talent.
The classical prenominal form of 素晴らしい (すばらしい). The -き ending is the attributive form of the classical adjective 素晴らし, which survives in modern Japanese as a literary or formal variant.