The answer is a "dam."
A wall that holds back water is a dike, levee or dam
levies
A levee holds back water.
A toilet tank, located at the back of the toilet bowl, holds clean water for flushing the toilet.
it is a dam that holds back water and it blokes the water like lakes,rivers and the ocean.
I'll be back
Earth or concrete/steel dams.
the back seat holds three but seperates into two seats
The component that holds toilet water starting with "Ci" is called the cistern. It is a tank located at the back of the toilet bowl that collects and stores water for flushing.
At a greater depth, there is a greater pressure, period. The amount of water in the dam is irrelevant.
A noun. It is the name given to an obstruction that holds back water.
a dam A barrier constructed to hold back water and raise its level, the resulting reservoir being used in the generation of electricity