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Probably because of the way it silently serves people.

Dumbwaiter is attested from 1749, British, description of a serving cart, a serving stand with tiers of revolving shelves, or an auxiliary serving table.

Canadians and Americans use the term "Lazy Susan" for the revolving shelf occasionally found on a serving table .

Attested from 1847, American English, description of a small freight elevator (or lift) to carry objects rather than people. The mechanical dumbwaiter was patented in the US in 1887.

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9y ago

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