The word "more splendiferous" means even more magnificent or splendid. However, its antonyms, which denote the opposite of it, include words such as ordinary, plain, simple, unexceptional, and unimpressive. These words are used to express an absence of grandeur, opulence, or beauty, and are commonly used when describing something that is considered average or below average. While more splendiferous may refer to something that is extraordinary or awe-inspiring, its antonyms signify a lack of such qualities, and are used to convey an unremarkable nature or a lack of distinction.