The term ROAST OR STIR-FRY can be solved by the four letter word COOK. A COOK is a professional who prepares food for consumption. Roasting and stir-frying are two common cooking techniques used to prepare food. Roasting involves cooking food in an oven or over an open flame, while stir-frying involves quickly cooking food in a wok or skillet with oil. Both techniques are used to create delicious meals.