tap / space
Classic usage
Pronunciation: /koʊˌɑ.pəˈɹeɪ.ʃən/
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
First attested in 1620–1630. Borrowed from French cooperation, from Late Latin cooperātiō. By surface analysis, co- + operation or cooperate + -ion.
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tap / space
Classic usage
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