text: what does shudder mean?   shud·der (shŭd'ər)  intr.v., -dered, -der·ing, -ders. to shiver convulsively, as from fear or revulsion. see synonyms at shake. to vibrate; quiver: the airplane shuddered in the turbulence. n. a convulsive shiver, as from fear or revulsion; a tremor.  [middle english shodderen, perhaps of middle dutch or middle low german origin.] courtesy: gurunet