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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English ocker, oker, from Old Norse ókr (“usury”), from Proto-Germanic *wōkraz (“progeny, earnings, profit”), from Proto-Indo-European *h₂weg- (“to add, increase”). More at oker.
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Classic usage
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