The word "side" refers to a position, direction, or aspect of something. It can denote one of the surfaces or edges of an object, an opinion or perspective in a discussion, or a specific region of an area. In general, "side" can be understood as a part that is distinct from the rest.
The word "side" originates from the Old English "side" (meaning "a place beside"), which is related to the Proto-Germanic "sidō," meaning "the side or flank." Its roots can also be traced back to Proto-Indo-European "se-" meaning "to sit."