a device, substance, or organism that depurates or purifies; something that removes impurities.
From 'depurate' plus '-or,' an agent noun suffix (from Latin). This suffix creates words for things or people that perform the action of the verb.
A depurator could be anything from a water filtration system to a living oyster—the suffix '-or' lets us name the tool or agent doing the work, so 'what depurates' becomes a 'depurator'!
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