rumbling

1. N-COUNT A rumbling is a low, continuous noise. 咕嚕聲

...the rumbling of an empty stomach. …空腹發出的咕嚕聲。

2. N-COUNT Rumblings are signs that a bad situation is developing or that people are becoming annoyed or unhappy. 風聲; 跡象

Even Baldwin had become aware that there were rumblings of discontent within the ranks. 就連鮑德溫也開始意識到內部成員有不滿的跡象。