noun
a person or thing that cleans, especially a person employed to clean the interior of a building
adjective
comparative form of clean, meaning more clean or having a higher level of cleanliness
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The cleaner used in this hospital is highly effective at killing germs.
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I hired a cleaner to help tidy up my apartment before the party.
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I need to grab some cleaner for my glasses, they're so dirty!
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Learning a new language can act as a mental cleaner, sharpening your cognitive abilities.