IPA: /ˈkwɪvərɪŋli/
KK: /ˈkwɪvərɪŋli/
In a way that shows shaking or trembling, often due to fear or excitement.
She spoke quiveringly, her voice shaking with emotion.
Quiveringly → It is formed from "quiver" (from Old English *cwifrian*, meaning to shake or tremble) and the suffix "-ingly" (meaning in a manner of). The word "quiveringly" means in a manner that shakes or trembles.
Think of the word 'quiver' which means to shake, and remember that 'quiveringly' describes doing something in a shaking manner.