Etymology

inefficiency

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Today it means: Lack of efficiency or effectiveness. Full definition →

English efficiency ← Middle English in- ← Latin in-
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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. Englishin-
  7. Englishefficiency
  8. English todayinefficiency

From in- + efficiency.

Etymology from Wiktionary, CC BY-SA 4.0.