mutter

咕哝、喃喃低语、低声说

He muttered something under his breath and walked away.

他低声咕哝了几句就走开了。

嘀咕、抱怨

The staff were muttering about the new overtime rules.

员工们私下嘀咕著新的加班规定。

发出低沉声响文学用法

Thunder muttered somewhere behind the distant hills.

远方山丘后传来低沉的雷声。

咕哝声、低语

She answered with a mutter I could barely hear.

她用我几乎听不见的低语回应。

怨言、抱怨声

There was a mutter of complaint from the back row.

后排传来一阵抱怨声。