mumble

1. V-T/V-I If you mumble, you speak very quietly and not at all clearly with the result that the words are difficult to understand. 咕噥

Her grandmother mumbled in her sleep. 她祖母睡覺時咕噥了。

He mumbled a few words. 他咕噥了幾句。

2. N-COUNT Mumble is also a noun. 咕噥

He could hear the low mumble of Navarro's voice. 他能聽到納瓦羅的低聲咕噥。