The term 'Swiss Army Knives Have Many USES' is a reference to the iconic Swiss Army Knife, which is a pocket knife that has multiple tools and functions. It was originally created by the Swiss Army in the late 19th century and has since become a popular tool for everyday use. The four-letter word for this term is 'USES', which refers to the many USES of the Swiss Army Knife. These include cutting, opening cans, screwing and unscrewing, and even opening bottles.