Etymology

redundant

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Today it means: Superfluous; exceeding what is necessary (and therefore no longer needed because other things fulfill its task or purpose). Full definition →

Latin redundāns
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The story

  1. Latin · borrowed fromredundāns
  2. English todayredundant

From Latin redundāns, present participle of redundō (“to overflow, redound”), from red- (“again, back”) + undō (“to surge, flood”), from unda (“a wave”).

Etymology from Wiktionary, CC BY-SA 4.0.