A device worn over the nose and mouth that filters the air you breathe to protect you from harmful dust, gases, or pollutants.
From Latin 'respirare' (to breathe), combining 're-' (again) and 'spirare' (to breathe), plus -or to name the device that helps you do this.
During the COVID-19 pandemic, N95 respirators became household items, but they've actually been protecting miners and factory workers for over a century—invisible heroes of public health.
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