The opposite of sweetened up can be unsweetened or unprocessed. When a food or drink is unsweetened, it means that it does not contain any added sugar or sweetener. This is often the case with healthy foods, like fruits and vegetables, as well as drinks like unsweetened tea or coffee. Unprocessed foods, on the other hand, are foods that have not been altered from their natural state. This means that they have not been sweetened, refined, or treated with chemicals to enhance their flavor or texture. Examples of unprocessed foods include whole grains, fresh fruits and vegetables, and lean meats.