verbs
deaden (a sound or noise), especially by wrapping
restrain or discourage
"the sudden bad news damped the joyous atmosphere"
is a type of (narrower)
lessen the intensity of; temper; hold in restraint; hold or keep within limits
"moderate your alcohol intake"; "hold your tongue"; "hold your temper"; "control your anger"
make vague or obscure or make (an image) less visible
"muffle the message"
lessen in force or effect
"soften a shock"; "break a fall"