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purify

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verb [transitive] British English pronunciation: purify /ˈpjʊərɪfaɪ/ 
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present tense
I/you/we/theypurify
he/she/itpurifies
present participlepurifying
past tensepurified
past participlepurified
  1. 1
    to make something clean by removing dirty or harmful substances from it

    The rooms are fitted with systems that purify the air and water.

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purifier

noun [countable]
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singularpurifier
pluralpurifiers

an air purifier

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