dampen

verbs

smother or suppress
"Stifle your curiosity"
make moist
"The dew moistened the meadows"
is derived from
is derived from
deaden (a sound or noise), especially by wrapping
reduce the amplitude (of oscillations or waves)
is a type of (narrower)
lessen the strength of
"The fever weakened his body"
make vague or obscure or make (an image) less visible
"muffle the message"
check; keep in check (a fire)
is a type of (narrower)
slow the growth or development of
"The brain damage will retard the child's language development"
lessen in force or effect
"soften a shock"; "break a fall"