can you just drink water every day without food

No, it is not possible to sustain yourself by only drinking water without consuming any food. While water is essential for survival and plays a crucial role in various bodily functions, it does not provide the necessary nutrients, calories, and sustenance that food does. A balanced diet that includes a variety of foods is important to meet the body's nutritional requirements for energy, vitamins, minerals, and other essential compounds. Prolonged consumption of only water without food would lead to severe malnutrition, weakness, and ultimately, can be life-threatening.