The term 'IT MAY BE SERVED IN A BED' can be solved by the word 'RICE', which is a four-letter word. RICE is a type of grain that is widely consumed and cultivated in many parts of the world. It is a staple food in many cultures and is often served as a side dish or as the main ingredient in dishes such as risotto, sushi, and paella. RICE can also be served in a bed, which is a common presentation for dishes such as biryani.