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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle French borne, from Old French bodne, from Medieval Latin bodina, a word of unknown ultimate origin, but possibly from Proto-Indo-European *bʰudʰmḗn (“bottom, base”), see also Proto-Celtic *bundos.
bourn
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Classic usage
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