trembling

US /ˈtrem.blɪŋ/
UK /ˈtrem.blɪŋ/
1.

run sợ

shaking slightly in a way that you cannot control, for example because you are frightened, angry, or excited, or because of illness:

:
"I was scared," she said in a trembling voice.
1.

run sợ

an act of shaking slightly in a way that you cannot control, for example because you are frightened, angry, or excited, or because of illness:

:
As she spoke, Jo bent over the book to hide the trembling of her lips.