Definition of unnecessary adjective from the Oxford Advanced American Dictionary

      

    unnecessary

     adjective
    adjective
    NAmE//ʌnˈnɛsəˌsɛri//
     
     
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  1. 1not needed; more than is needed synonym unjustified unnecessary expense They were found guilty of causing unnecessary suffering to animals. All this fuss is totally unnecessary. opposite necessary
  2. 2(of remarks, etc.) not needed in the situation and likely to be offensive synonym uncalled for That last comment was a little unnecessary, wasn't it?
unnecessarily
 
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NAmE//ˌʌnnɛsəˈsɛrəli//
 
adverb There's no point worrying him unnecessarily. unnecessarily complicated instructions
See the Oxford Advanced Learner's Dictionary entry: unnecessary