dampen

(verb) smother or suppress. Synonyms: stifle. Examples: "Stifle your curiosity."

(verb) make moist. Synonyms: moisten, wash. Examples: "The dew moistened the meadows."

(verb) deaden (a sound or noise), especially by wrapping. Synonyms: muffle, mute, dull, damp, tone down.

(verb) reduce the amplitude (of oscillations or waves).

(verb) make vague or obscure or make (an image) less visible. Synonyms: deaden, damp. Examples: "Muffle the message."

(verb) check; keep in check (a fire).

(verb) lessen in force or effect. Synonyms: damp, soften, weaken, break. Examples: "Soften a shock." "Break a fall."