murmur

complain, grumble, murmur

murmur, mutter, whisper

名词 murmur:

1. a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech
   同义词：mutter, muttering, murmuring, murmuration, mussitation
2. a schwa that is incidental to the pronunciation of a consonant
   同义词：murmur vowel
3. an abnormal sound of the heart; sometimes a sign of abnormal function of the heart valves
   同义词：heart murmur, cardiac murmur
4. a complaint uttered in a low and indistinct tone
   同义词：grumble, grumbling, murmuring, mutter, muttering

动词 murmur:

1. speak softly or indistinctly
2. make complaining remarks or noises under one's breath
   同义词：mutter, grumble, croak, gnarl

1. An angry murmur ran through the crowd.
   群众纷纷气愤地抱怨著。
2. The murmur swelled into a roar.
   窃窃私语的声音变大形成一片喧哗。
3. There was a low murmur of conversation in the hall.
   大厅里有窃窃私语声。

mur.mur

n.（名词）
A low, indistinct, continuous sound:
低沉连续的声音：轻微、含糊不清、持续的声音：
例句：
spoke in a murmur; the murmur of the waves.
轻轻地说；波涛的轻微的拍击声

An indistinct, whispered, or confidential complaint; a mutter.
咕哝不清楚的、小声的或者偷偷的抱怨；嘟哝
Medicine An abnormal sound, usually emanating from the heart, that sometimes indicates a diseased condition.
【医学】 心杂音：不正常的声音，通常由心脏发出，有时意味着有病
v.（动词）
mur.mured,mur.mur.ing,mur.murs
v.intr.（不及物动词）
To make a low, continuous, indistinct sound or succession of sounds.
发出很小的声音：发出一种或者一系列的低微、连续、含糊的声音
To complain in low mumbling tones; grumble.
低声抱怨：用低微含糊的语调抱怨；发牢骚
v.tr.（及物动词）
To say in a low indistinct voice; utter indistinctly:
低声说：用轻微不清楚的声音说：
例句：
murmured his approval.
小声表示赞同

来源：
Middle English murmure
中古英语 murmure
from Old French
源自 古法语
from Latin murmur [a humming, roaring]
源自 拉丁语 murmur [哼哼声，轰鸣声]

【引伸】
mur.murer
n.（名词）
mur.muringly
adv.（副词）
mur.murous
adj.（形容词）
mur.murously
adv.（副词）