Magnificent
late Middle English: via Old French from Latin magnificent- ‘making great’, based on magnus ‘great’.
wiktionary
From Middle French magnificent, from Latin magnificentior, comparative of magnificus(“great in deeds or sentiment, noble, splendid, etc.”), from magnus(“great”) + -ficens, a form of -ficiens, the regular form, in compounds, of faciens, a participle of facere(“to do”).
etymonline
magnificent (adj.)
mid-15c., "exalted, glorious, great in actions or deeds," from Old French magnificent, a back-formation from Latin magnificentior, comparative of magnificus "great, elevated, noble, distinguished," literally "doing great deeds," from magnus "great" (from PIE root *meg- "great") + combining form of facere "to make" (from PIE root *dhe- "to set, put"). Meaning "characterized by grandeur or stateliness; living in splendor" is from 1520s. As an exclamation expressing enthusiastic admiration, by 1704.
