Antonyms of adj magnificent

1 sense of magnificent

Sense 1
brilliant, glorious, magnificent, splendid -- (characterized by grandeur; "the brilliant court life at Versailles"; "a glorious work of art"; "magnificent cathedrals"; "the splendid coronation ceremony")

INDIRECT (VIA impressive) -> unimpressive -- (not capable of impressing)

Similarity of adj magnificent

1 sense of magnificent

Sense 1
brilliant, glorious, magnificent, splendid -- (characterized by grandeur; "the brilliant court life at Versailles"; "a glorious work of art"; "magnificent cathedrals"; "the splendid coronation ceremony")
       => impressive (vs. unimpressive) -- (making a strong or vivid impression; "an impressive ceremony")