UNNECESSARILY
unnecessarily
(adverb) without any necessity; “this marathon would exhaust him unnecessarily”
unnecessarily
(adverb) in an unnecessary manner; “they were unnecessarily rude”
Source: WordNet® 3.1
Etymology
Adverb
unnecessarily (comparative more unnecessarily, superlative most unnecessarily)
In an unnecessary way; not by necessity.
Synonyms: needlessly, pointlessly, uselessly, for no reason
To an extent beyond what is needed.
Synonym: unduly
Antonyms
• necessarily
Source: Wiktionary
UNNECESSARY
Un*nec"es*sa*ry, a.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition