depress

[1]	deject , dispirit , oppress , get down , dismay , sadden , grieve , cast down , demoralize , demoralise , dishearten , discourage , dampen , cast a gloom/pall over , burden , weigh down
[2]	weaken , dull , debilitate , enervate , sap , depreciate , cheapen , devalue , devaluate , diminish , lower , bring down , reduce
[3]	press (down) , push (down) (on) , lower
[4]	press down