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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From the Robert A. Heinlein story Waldo, published in Astounding in 1940, derived from the name of the eponymous protagonist, Waldo F. Jones, who invented remote manipulators to overcome his own myasthenia gravis.
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Classic usage
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