The noodle is a type of staple food made from some type of unleavened dough which is rolled flat and cut into one of a variety of shapes. While long thin strips may be the most common, many varieties of noodles are cut into waves, helices, tubes, strings, shells, folded over, or cut into other shapes. Noodles are usually cooked in boiling water, sometimes with cooking oil or salt added. They are often pan fried or deep fried. Noodles can be refrigerated for short-term storage, or dried and stored for future use. In English usage, the word "noodle" is an inclusive term that denotes texture and culinary use, and to a lesser extent, shape, as many people may associate it with the more common string varieties, such as spaghetti or ramen. Material composition or geocultural origin must usually be specified. However, the actual word derives from the German Nudel.