The term 'Simple Building' can be described by the three letter word 'HUT'. A HUT is a small, basic structure that is typically used for shelter or storage. It is usually made of natural materials such as wood, stone, or mud and is often found in rural areas. Huts are often used as temporary dwellings, but can also be permanent homes. They are usually simple in design and construction, making them an ideal choice for those who need a basic shelter.