Your age.
When something winds down, it gradually slows down, stops, or comes to an end. Energy or activity decreases until it eventually ceases completely.
Heat goes up when rain comes down. This is a kid joke.
In the sea-evaporates from the sea, comes down as rain on land, goes down the rivers to go back to the sea.
On a spring tide, the sea comes high up the beach and then goes low down the beach. A neap tide goes high and low between the range of a spring tide (half way up and half way down the beach).
Depletion is when something goes down. For example: Let's say you had many people and a large amount of food. Over time that food will start to deplete (go down), until there is nothing left.
Your age!
Something that reaches the escape velocity of the body its coming up from.
age
your age
rain
your age
your age
A waterfall
Age
Age.
rain goes down, but never goes up actually it evaporates is transformed to water vapor goes into the clouds and eventually comes down as rain again (pixilated)
dirt