'Unnecessarily' definitions:

Definition of 'unnecessarily'

From: WordNet
adverb
In an unnecessary manner; "they were unnecessarily rude" [ant: necessarily, needfully]
adverb
Without any necessity; "this marathon would exhaust him unnecessarily"

Definition of 'Unnecessarily'

From: GCIDE
  • Unnecessary \Un*nec"es*sa*ry\, a. Not necessary; not required under the circumstances; unless; needless; as, unnecessary labor, care, or rigor. -- {Un*nec"es*sa*ri*ly}, adv. -- {Un*nec"es*sa*ri*ness}, n. [1913 Webster] [1913 Webster]