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unnecessary

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unnecessary
unnecessary /ʌnˈnesəsəri $ -seri/ adjective
 Word Family: noun: necessity, the necessaries, the necessary; verb: necessitate; adverb: necessarilyunnecessarily; adjective: necessaryunnecessary
not needed, or more than is needed
    unnecessary expense/cost/extravagance etc
    an unnecessary expense
    There’s no point in taking unnecessary risks.
    We can’t afford any unnecessary delays.
    Williams was found guilty of causing unnecessary suffering to animals
—unnecessarily /ʌnˈnesəsərəli $ ˌʌn-nesəˈserəli/ adverb:
    I don’t want to worry you unnecessarily.
     
COLLOCATIONS
■ adverbs
    totally/completely/entirely unnecessary The suffering of these animals is totally unnecessary.
    quite unnecessary British English ‘I’ll give you a lift.’ ‘Thank you, but that’s quite unnecessary.’
■ nouns
    unnecessary suffering She admitted causing the dog unnecessary suffering.
    an unnecessary risk Neither team is likely to take any unnecessary risks, so the result will probably be a draw.
    an unnecessary expense/cost He thinks advertising is an unnecessary expense.
    an unnecessary extravagance (=something that costs more than is necessary or more than you can afford) The chairman called first-class airline travel an unnecessary extravagance.