Quivering
/ˈkwɪvəɹɪŋ/
verb
To shake or move with slight and tremulous motion; to tremble; to quake; to shudder; to shiver.
noun
A motion by which something quivers or trembles.
“quiverings of the eyelid”
adjective
Shaking, shivering
“The quivering mass of jello rocked back and forth incessantly but remained on the plate.”