Etymology

inadequate

in·ad·e·quate
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Today it means: Not adequate; lacking in quality or quantity required; insufficient for a purpose. Full definition →

English adequate ← Latin adaequātu ← Old Latin aiquos
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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. Proto-Indo-European*h₂éd
  8. Proto-Italic*ad
  9. Proto-Italic*ad-
  10. Latinad-
  11. Proto-Italic*aikʷos?
  12. Old Latinaiquos
  13. Latinaequus
  14. Latinaequō
  15. Latinadaequō
  16. Latinadaequātu
  17. Englishadequate
  18. English todayinadequate

From in- + adequate.

Etymology from Wiktionary, CC BY-SA 4.0.