deafen

verbs

be unbearably loud
"a deafening noise"
deafen
entails
emit a noise
make noise, noise, resound
make or render deaf
"a deafening noise"
deaf, deafen
make soundproof
"deafen a room"
deafen
is a type of (narrower)
lessen in force or effect
"soften a shock"; "break a fall"
break, damp, dampen, soften, weaken