From Latin 'magnus' (great) + 'facere' (to make) — literally 'doing great things' or 'making greatness.'
Extremely beautiful, elaborate, or impressive; splendid.
From Latin 'magnificus' (splendid, grand, sumptuous, generous), a compound of 'magnus' (great, large, from PIE *meg- meaning great) + 'facere' (to make, to do, from PIE *dʰeh₁- meaning to place, to do, to make). Latin *magnificus therefore means literally 'making great things' or 'great-making' — the person who does magnificent deeds or builds on a grand scale. PIE *meg- is one of the widest-ranging roots in the family: Greek 'megas' (great), Sanskrit 'maha-' (great, as in Mahabharata, the Great Bharata War
Lorenzo de' Medici was called 'il Magnifico' — 'the Magnificent' — using the Italian form of this Latin word. The title literally meant 'the one who does great things,' emphasizing his patronage and grand achievements. Similarly, Suleiman the Magnificent was so named by Europeans, though in Ottoman Turkish he was called 'Kanuni' (the Lawgiver).