The word "卧室" is formed by combining the character "卧", meaning to sleep or lie down, with "室", meaning room or chamber. "卧" is composed of "臣" and "卜", often representing a person in a resting position, while "室" consists of "宀" (roof) and "至" (to arrive), indicating an enclosed space. Together, they create a compound where "卧" specifies the function of sleeping and "室" denotes the room, resulting in the literal meaning "sleeping room" or bedroom.