1340, "loftiness of thought or purpose," from O.Fr.
magnanimite "high-mindedness," from L.
magnanimitatem (nom.
magnanimitas) "greatness of soul, high-mindedness," from
magnanimus "having a great soul," from
magnus "great" (see
magnate) +
animus "mind, soul, spirit." Probably a loan-translation of Gk.
megalopsychos "high-souled, generous" (Aristotle) or
megathymus "great-hearted."