immune

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a person who is immune to a particular infection
  2. adjective relating to the condition of immunity
  3. adjective secure against

Etymology

From Middle English, from Middle French immun, from Latin immūnis (“exempt from public service”), from in- (“not”) + mūnus (“service”).

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