What is acumalation?

Answer 1

Water that gathers and makes or turns into a cloud

Answer 2

Accumulation refers to the process of gradually gathering or collecting something over time. It can refer to the gradual build-up of a substance, such as snow or dirt, or the steady growth of assets or wealth. In a biological context, accumulation may also refer to the gradual build-up of toxins or other substances in an organism's body.