"quivering" in the noun sense
1. shaking, shakiness, trembling, quiver, quivering, vibration, palpitation
a shaky motion
"the shaking of his fingers as he lit his pipe"
2. vibration, quiver, quivering
the act of vibrating
"quivering" in the verb sense
1. quiver, quake, palpitate
shake with fast, tremulous movements
"His nostrils palpitated"
2. flicker, waver, flitter, flutter, quiver
move back and forth very rapidly
"the candle flickered"
3. pulsate, beat, quiver
move with or as if with a regular alternating motion
"the city pulsated with music and excitement"
Source: WordNet® (An amazing lexical database of English)
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