Depress

To press down; to cause to sink; to let fall; to lower; as, to depress the muzzle of a gun; to depress the eyes.

To bring down or humble; to abase, as pride.

To cast a gloom upon; to sadden; as, his spirits were depressed.

To lessen the activity of; to make dull; embarrass, as trade, commerce, etc.

To lessen in price; to cause to decline in value; to cheapen; to depreciate.

To reduce (an equation) in a lower degree.

Having the middle lower than the border; concave.