Shack (noun)

1. A small, roughly built cabin or shelter.
2. A small, basic, and often temporary or improvised dwelling.
3. A small, run-down or poorly constructed building.

Origin:

The word "shack" originated in the late 18th century, it is thought to be of uncertain origin, but may be related to the word "shake", meaning a building made of rough or unsteady materials.

Examples:

1. The shack was made of wood and had a tin roof.
2. The shack was used as a hunting cabin.
3. He lived in a shack by the lake.
4. The shack was so small that he could barely move inside.
5. The shack had no electricity or running water.