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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowing from Latin vertebra (“a joint”), from vertō (“to turn”) + -bra (instrumental nominal suffix). Having multiple vertebrae (plural of vertebra) in one's backbone instead of having a single bone or solid spine, allows for the movement of the body with bends and turns. Hence meaning 1.
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Classic usage
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