VERB
使(声音)低沉;使(音量)减弱
If something muffles a sound, it makes it quieter and more difficult to hear.
例句
Blake held his handkerchief over the mouthpiece to muffle his voice...
布莱克把手绢包在话筒上，以使自己的声音听起来模糊不清。
She heard a muffled cough behind her.
她听到身后一声低沉的咳嗽。