The term 'resell quickly' can be summarized by the crossword solution 'FLIP, ' which is a four-letter word. Flipping is a term used to describe the process of buying and reselling items quickly for a profit. This practice is often used in real estate, where investors purchase properties, renovate them, and then resell them at a higher price. It can also be used in other markets, such as stocks, commodities, and even consumer goods.