abate
allay
alleviate
anesthetize
appease
arrest
assuage
attemper
attenuate
backpedal
backwater
bank the fire
bate
benumb
block
blunt
bog down
bottle up
brake
chasten
check
clip the wings
come apart
confine
constrain
control
countercheck
curb
cushion
dam up
damp
dampen
de-emphasize
deaden
deaden the pain
decelerate
degenerate
delay
detain
deteriorate
die down
diffuse
dilute
diminish
disimprove
disintegrate
disjoin
disperse
dissolve into chaos
slakin
decrease
lessen
minify
weaken
slackened
slackening
slackens
slack
slacker
Machen
blacken
bracken