Longman Dictionary of Contemporary English homepage

misuse

1 verb
     
mis‧use1 [transitive]
1 to use something for the wrong purpose, or in the wrong way, often with harmful results:
Even harmless drugs can be misused.
The term 'schizophrenia' is often misused.
There is concern that the judges might misuse their power.
2 to treat someone badly or unfairly

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