quivering
quiv-er-ing
adjective
Shaking or trembling slightly and rapidly, often due to fear or cold.
"A quivering lip betrayed her nervousness."
verb
The act of shaking or trembling with small, rapid, involuntary movements.
"He was quivering uncontrollably from the cold."
Thesaurus
Synonyms: shaking, shakiness, vibration, trembling, palpitation, quiver