[v] lessen the activity or force of; "The rising inflation depressed the economy"
[v] press down; "Depress the space key"
[v] cause to drop or sink; "The lack of rain had depressed the water level in the reservoir"
[v] lower someone's spirits; make downhearted; "These news depressed her"; "The bad state of her child's health demoralizes her"
[v] lower (prices or markets); "The glut of oil depressed gas prices"