the.com/knocker

A doorbell for people who distrust electricity and love a good metal smack.

means A hinged metal fitting on a door that you lift and drop to rap against a plate, announcing yourself the old-fashioned way.

from Straightforward Old English/Germanic stock — 'knock' traces to Middle English 'knokken,' imitating the very sound it describes (a thump echoed in Old Norse 'knoka' too), with '-er' simply tacked on for 'the thing that does it.' No hidden drama here: it's one of language's honest onomatopoeias, naming the object by the noise it makes.

origin
Common in Europe by the 1300s
etymology
From old english cnocian, meaning to knock
design flex
Often cast as lions, hands, or gargoyles
slang use
British slang for breasts since 1920s
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