What is the meaning of dampen?

verb

• Smother or suppress.
  • usage: "Stifle your curiosity"
  • synonyms: stifle
• Make moist.
  • usage: "The dew moistened the meadows"
  • synonyms: moisten, wash
• Deaden (a sound or noise), especially by wrapping.
  • synonyms: muffle, mute, dull, damp, tone down
• Reduce the amplitude (of oscillations or waves. )
• Make vague or obscure or make (an image) less visible.
  • usage: "muffle the message"
  • synonyms: deaden, damp
• Check; keep in check (a fire. )
• Lessen in force or effect.
  • usage: "soften a shock"; "break a fall"
  • synonyms: damp, soften, weaken, break