Etymology

retarder

R1E1T1A1R1D2E1R1

Today it means: Something which retards or slows. Full definition →

English retard ← Middle English retarden ← Anglo-Norman retarder
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The story

  1. Proto-Italic*wre-
  2. Latinre-
  3. Proto-Indo-European*terh₂-
  4. Proto-Indo-European*tr̥h₂dos
  5. Proto-Italic*tardos
  6. Latintardus
  7. Latinretardō
  8. Anglo-Normanretarder
  9. Middle Englishretarden
  10. Englishretard
  11. English todayretarder

From retard + -er.

Etymology from Wiktionary, CC BY-SA 4.0.