grumble

complain, grumble, murmur

这些动词均含“抱怨、埋怨”之意。
complain: 侧重因对处境不满、待遇不公或自己有痛苦等而向别人诉说、埋怨。
grumble: 指因对处境、待遇不满或其他个人因素而愤愤不平地向他人诉苦或自言自语。
murmur: 多指因不满某人或某事而背着人自言自语地发怨言。

名词 grumble:

1. a loud low dull continuous noise
   同义词：rumble, rumbling, grumbling
2. a complaint uttered in a low and indistinct tone
   同义词：grumbling, murmur, murmuring, mutter, muttering

动词 grumble:

1. show one's unhappiness or critical attitude
   同义词：grouch, scold
2. make complaining remarks or noises under one's breath
   同义词：murmur, mutter, croak, gnarl
3. to utter or emit low dull rumbling sounds
   同义词：growl, rumble
4. make a low noise
   同义词：rumble

1. He has everything he needs, but he is still full of grumbles.
   他需要的一切都得到了，却还牢骚满腹。
2. They will grumble about having to do the work.
   他们将为不得不干那项工作而抱怨。