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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English longsum, from Old English langsum (“long; taking a long time; lasting a long time; long-enduring; long-suffering”), from Proto-West Germanic *langasam (“lengthy; long-lasting; vast; extensive”), equivalent to long + -some.
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Classic usage
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