资料来源 : Webster's Revised Unabridged Dictionary (1913)

Shudderingly \Shud"der*ing*ly\, adv.
   In a shuddering manner.

资料来源 : WordNet®

shudderingly
     adv : with a shudder; "shudderingly, she acknowledged to herself
           that she dared not face what lay before her"