Bathroom, lavatory, washroom, loo, restroom, powder room, john, and WC are some of the popular synonyms for the word bathroom. The term bathroom refers to a room specially designed for bathing and other sanitary purposes. The word lavatory is commonly used in British English referring to a room with a toilet and washbasin. Washroom, restroom, and powder room are equivalent terms with bathroom in American English. The term loo derives from the French word "l'eau" meaning water and is a popular reference to a toilet in British English. John and WC are informally used in American English, where John is associated with a portable toilet and the WC stands for water closet.