Etymology

irreducible

I1R1R1E1D2U1C3I1B3L1E1

Today it means: Not able to be reduced or lessened. Full definition →

English reducible ← Middle English reducen ← Old French reduire
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Italic*n̥-
  4. Latinin-
  5. Middle Englishin-
  6. Englishir-
  7. Old Frenchreduire
  8. Middle Englishreducen
  9. Englishreduce
  10. Englishreducible
  11. English todayirreducible

From ir- + reducible.

Etymology from Wiktionary, CC BY-SA 4.0.