dampen

Verb

• lessen in force or effect
  • soften a shock
    
  • break a fall
    

• check; keep in check (a fire)

• make vague or obscure or make (an image) less visible
  • muffle the message
    

• reduce the amplitude (of oscillations or waves)

• deaden (a sound or noise), especially by wrapping

• make moist
  • The dew moistened the meadows
    

• smother or suppress
  • Stifle your curiosity
    

Related words

• Synonyms: 
  damp , soften , weaken , break , deaden , muffle , mute , dull , tone down , moisten , wash , stifle
• Antonyms: 
  stimulate , excite