The jayrun water clock is a fascinating device that measures time using the flow of water. Synonyms for the jayrun water clock include water-powered clock, hydraulic clock, and clepsydra. These devices were used in ancient times to keep track of time for religious ceremonies and other important events. The jayrun water clock works by using a container of water with a hole in the bottom to control the flow of water into another container. As the water flows out of the hole, it marks the passage of time. Today, water clocks are still used in some parts of the world as a symbol of tradition and cultural heritage.