quaver

1. V-I If someone's voice quavers, it sounds unsteady, usually because they are nervous or uncertain. (聲音)顫抖

Her voice quavered and she fell silent. 她的聲音顫抖著，繼而沉默了下來。

2. N-COUNT Quaver is also a noun. 顫音

There was a quaver in Lena's voice. 莉娜的聲音中有顫音。

3. N-COUNT A quaver is a musical note that is half as long as a quarter note. 八分音符[英國英語]