What is the meaning of quivering?

noun

• A shaky motion.
  • usage: "the shaking of his fingers as he lit his pipe"
  • synonyms: shaking, shakiness, trembling, quiver, vibration, palpitation
• The act of vibrating.
  • synonyms: vibration, quiver

verb

• Shake with fast, tremulous movements.
  • usage: "His nostrils palpitated"
  • synonyms: quiver, quake, palpitate
• Move back and forth very rapidly.
  • usage: "the candle flickered"
  • synonyms: flicker, waver, flitter, flutter, quiver
• Move with or as if with a regular alternating motion.
  • usage: "the city pulsated with music and excitement"
  • synonyms: pulsate, beat, quiver