Read the dictionary definition of dampen. All definitions for this word.
1. make moist
1. The dew moistened the meadows
2. lessen in force or effect
1. soften a shock
2. break a fall
3. check; keep in check (a fire)
4. make vague or obscure or make (an image) less visible
1. muffle the message
5. suppress or constrain so as to lessen in intensity
1. Stifle your curiosity
6. reduce the amplitude (of oscillations or waves)
7. deaden (a sound or noise), especially by wrapping