Over-filled is a term used to describe a situation where something is stuffed or packed beyond its capacity. Some antonyms for over-filled include empty, bare, scant, insufficient, and inadequate. An empty container or space has nothing in it and can be filled as needed. Bare refers to something that is lacking in quantity, quality, or substance. Scant means that there is an insufficient amount of something to meet a certain need. Inadequate refers to something that is not enough to fulfill a specific purpose. These words convey the opposite meaning of over-filled, which highlight that there is not enough space or resources to accommodate what is being placed inside.