v. 1 shake, tremble, vibrate, shiver, quaver; shudder, tremor, oscillate, fluctuate, wobble He felt his lips quivering as he told her that he was dying The outcome of the contest quivered in the balance.
n. 2 tremble, quaver, shudder, spasm, shake, tremor, shiver Pierced by the dart, the tiny bird fell to the earth, gave a little quiver, and lay still