To reduce (an equation) in a lower degree.
To cause a depression or a decrease in parts of the economy.
To make depressed, sad or bored.
To press down.
To bring down or humble; to abase (pride, etc.).
To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original.
out of focus; blurry.
dulled or intentionally blunt.