(每日一词）mutter

mutter   /ˈmʌt̬.ɚ/ v./n. 嘟囔，咕哝

meaning: to speak quietly and in a low voice that is not easy to hear, often when you are worried or complaining about something

meaning: (the sound of) words being said very quietly 

对比：mutter—butter; m—拟声嘟囔

联想：mutter (麻的，嘟囔着骂人的话）

e.g. Laurence mutter something about his wife and left. 劳伦斯低声说了他妻子的什么事就离开了。