depression

[1]	indentation , dent , dimple , impression , pit , hollow , recess , cavity , concavity , dip
[2]	dejection , despair , economic crisis , gloom , downheartedness , sadness , melancholy , discouragement , despondency , gloominess , glumness , the blues , unhappiness , (Colloq) the dumps
[3]	recession , natural depression , slump , (economic) decline , downturn , (US/Canadian) bust
[4]	Great Depression
[5]	low
[6]	depressive disorder , clinical depression
[7]	imprint