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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Formed under the implication that the word immune was formed in modern English with the prefix im- and another word. The word immune was actually formed from a prefix in Latin immūnis (“exempt from public service”), from in- (“not”) + mūnus (“service”).
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Classic usage
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