dampen (v.)suppress or constrain so as to lessen in intensity;
dampen (v.)deaden (a sound or noise), especially by wrapping;
dampen (v.)reduce the amplitude (of oscillations or waves);
dampen (v.)make vague or obscure or make (an image) less visible;
dampen (v.)check; keep in check (a fire);
dampen (v.)lessen in force or effect;