One physicist calculated that crop circles could potentially be the result of very strong downward spiralling winds.
The road slopes downwards to the river.
Over the past quater century there is a downward trend in use of pesticides.
downward spiral of
the pain leads into a downward spiral of hatred and obsession, if you enter a downward spiral, you got into a situation that gets worse and worse
If you enter a downward spiral, you got into a situation that gets worse and worse: We have to avoid the downward spiral in which unemployment leads to homelessness and then to crime.
The hill slopes downward to the river.
The water runs downward to the pond.
I was looking downward to the bottom of the valley.
He went downward in life.