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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Unclear. Middle English ōssen had a rather different meaning, "to reveal, to prophesy", but the OED suggests it could nonetheless be the same verb. The origin of the Middle English verb is itself obscure, but it may be a variant of halsen, from Old English hālsian, although this too had a rather different meaning, "to beseech, entreat; to exorcise; to imprecate".
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Classic usage
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