A round-bottomed vessel is a type of container that has a curved bottom and sides that slope up to a flat top. The most common example of this type of vessel is the wok, which is a three-letter word used in crosswords. Woks are traditionally used in Chinese cooking, but they can also be used for other types of cooking. They are made from a variety of materials, including cast iron, aluminum, and carbon steel. The round bottom of the wok allows for even heat distribution, making it ideal for stir-frying.