The prefix for 'ECONOMICS' or 'nutrients' is 'macro, ' which is a five-letter word. The term 'macro' is derived from the Greek word makros, meaning 'LARGE.' It is used to refer to something that is LARGE in scale or scope. In ECONOMICS, it is used to describe economic policies and systems that affect the entire economy, such as fiscal and monetary policy. In nutrition, it is used to refer to nutrients that are needed in LARGE amounts, such as carbohydrates, proteins, and fats.