uselessness 

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n. ���ã���Ч

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n. inutility��unusefulness

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n.   usefulness��utility

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1. "To make you see the uselessness of having one".
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2. Well, uselessness can be turned into usefulness.
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3. Many people have the impression that old age represents uselessness, senility, and the approach of death.
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n.
  1. the quality of having no practical use

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uselessness
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feeling of uselessness
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a feeling of uselessness
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