The term Giza's River is referring to the Nile, which is a 4 letter word. The Nile is the longest river in the world, stretching over 4, 000 miles from its source in East Africa to its mouth in the Mediterranean Sea. It has been an important part of life in Egypt for thousands of years, providing water for drinking, irrigation, and transportation. It is also home to many species of fish, birds, and other wildlife.