When something's awash, it's doused or covered with water. If your canoe is awash with seawater, it's time to start bailing.
A beach might be awash during high tide, and your beach cottage could be awash after a tropical rain. The decks of a boat are often described as being awash during a storm, flooded with water. Things can be figuratively awash, too: "The movie premiere was awash with photographers and fans." Awash was originally a nautical word meaning "flush with," from the 15th-century meaning of wash, "land alternately covered and exposed by the sea."