"Satura" originally referred to a "mixed dish" or "medley" of different ingredients. This reflects the nature of satire, which often blends humor, wit, irony, and sometimes even anger to criticize and expose flaws in society, individuals, or institutions.
Think of it like a dish that combines sweet and savory, or different textures - it's a mix of elements, but it all comes together to create a specific and often pointed effect.