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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From the trademark Klaxon, based on Ancient Greek κλάζω (klázō, “make a sharp sound; scream”). The word was coined by Franklyn Hallett Lovell Jr., the founder of the Lovell-McConnell Manufacturing Co. of Newark, New Jersey, USA, which in 1908 obtained a licence of the patent to the machine generating the sound from American inventor Miller Reese Hutchison (1876–1944).
claxon
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Classic usage
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