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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English infer (“entrance”), from Old English infær (“ingress, entrance, ingang”), from Proto-Germanic *in + *farą (“a going”), corresponding to in- + fare. Related to Old English infaru (“inroad, incursion, invasion”). Compare German einführen (“to introduce”).
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Classic usage
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