muffle
verb [ T ] uk/ˈmʌf.əl/ us/ˈmʌf.əl/
(MAKE LESS CLEAR)
使（声音）变轻微（或低沉）;消（声）
to make a sound quieter and less clear
The house has double-glazed windows to muffle the noise of aircraft. 这所房子装有双层玻璃窗以减弱飞机噪声的干扰。
削弱，使模糊
to make something less strong or clear
The report concluded that business pressure on the government had muffled the impact of the legislation. 报告得出结论，企业对政府的压力已削弱了立法的影响。
(KEEP WARM)
（为保暖而用厚衣物）围裹，裹住;蒙住
to wear thick warm clothes in order to keep warm
I was muffled up against the cold in a scarf and hat. 我裹上围巾、戴上帽子以抵御寒冷。