'Witheringly' definitions:

Definition of 'witheringly'

From: WordNet
adverb
In a withering manner; "guns fired witheringly at the railroad cars"

Definition of 'Witheringly'

From: GCIDE
  • Withering \With"er*ing\, a. Tending to wither; causing to shrink or fade. -- {With"er*ing*ly}, adv. [1913 Webster]