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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Latin sēstertius (“that is two-and-a-half”), from sēmis (“half”) + tertius (“third”), in which “third” refers to the third as: the sestertius was worth two full asses and half of a third.
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Classic usage
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