informer

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun one who reveals confidential information in return for money

Etymology

Inherited from Middle English enformour, from Anglo-Norman enfourmour; equivalent to inform + -er.

In classic literature

Synonyms

betrayer, rat, squealer, blabber

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