A person who gargles, or a device used for gargling liquids in the throat.
From gargle (to swish liquid in the throat) plus -er (one who does something). Gargle itself comes from Old French gargouille, meaning throat or gurgling sound, which also gave us gargoyle.
The word gargle mimics the actual sound it describes—it's onomatopoeia! The same root gave us 'gargoyle,' those spooky throat-like water channels on medieval buildings.
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