deaden
verb [ T ] uk/ˈded.ən/ us/ˈded.ən/
缓解，减轻（疼痛）；削弱
to make something less painful or less strong
Morphine is often used to deaden the pain of serious injuries. 吗啡常用来缓解重伤引起的疼痛。
Double glazing has helped to deaden the noise from the road. 装上双层玻璃有助于降低公路上传来的噪音。