Devices or substances that remove impurities, contaminants, or unwanted elements from air, water, or other materials.
From Latin 'purificare' meaning 'to make pure', combining 'purus' (pure, clean) with 'facere' (to make). The concept entered English through Old French 'purifier' in the 14th century.
Air and water purifiers represent humanity's ongoing battle against invisible threats - from ancient methods like boiling water to modern HEPA filters capturing particles 300 times smaller than a human hair. The same Latin root 'purus' gives us 'pure', 'purity', and even 'Puritan'.
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