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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 English penne knyfe; equivalent to pen + knife. In the original sense, named for its purpose: aiding the use of a (traditional) ink pen through the following tasks: trimming the tip of a quill pen, trimming a reed for a nib, and (in some cases) allowing erasure by scraping away some ink.
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Classic usage
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