Basin (noun)

1. A bowl-shaped container, typically used for holding water for washing.
2. A natural depression in the surface of the land, typically containing water, such as a lake or sea.
3. An area of land drained by a river and its tributaries.

Origin:

Middle english: from old french baissin, from late latin bassinus "bowl", from greek bathinos "deep".

Examples:

1. She washed her face in the basin of water.
2. The basin of the Great Salt Lake is a unique ecosystem.
3. The Amazon River basin is the largest drainage basin in the world.
4. The basin was filled with water from the nearby stream.
5. The basin was used for irrigation.