The term IT MAY CAUSE INFLATION can be summarized by the crossword solution PUMP, which is a four-letter word. A PUMP is a device used to move fluids, such as liquids or gases, from one place to another. In economics, a PUMP is often used to refer to an increase in the money supply, which can lead to inflation. Inflation is an economic phenomenon that occurs when prices rise due to an increase in the money supply.