'Cruelly' definitions:

Definition of 'cruelly'

From: WordNet
adverb
Excessively; "a cruelly bitter winter"
adverb
With cruelty; "he treated his students cruelly"

Definition of 'Cruelly'

From: GCIDE
  • Cruelly \Cru"el*ly\, adv.
  • 1. In a cruel manner. [1913 Webster]
  • 2. Extremely; very. [Colloq.] --Spectator. [1913 Webster]