Etymology

invalid

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Today it means: Not valid; not true, correct, acceptable, or appropriate. Full definition →

English valid ← Middle French valide ← Latin validus
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invalid · adjective1

  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*h₂welh₁-
  8. Proto-Indo-European*h₂wl̥h₁éh₁yeti
  9. Proto-Italic*walēō
  10. Latinvaleō
  11. Proto-Indo-European*dʰeh₁-
  12. Latinvalidus
  13. Middle Frenchvalide
  14. Englishvalid
  15. English todayinvalid

From in- + valid.

invalid · noun, adjective, verb2

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Italic*n̥-
  4. Latinin-
  5. Proto-Indo-European*h₂welh₁-
  6. Proto-Indo-European*h₂wl̥h₁éh₁yeti
  7. Proto-Italic*walēō
  8. Latinvaleō
  9. Proto-Indo-European*dʰeh₁-
  10. Latinvalidus
  11. Latininvalidus
  12. Middle Frenchinvalide
  13. English todayinvalid

Borrowed from Middle French invalide, from Latin invalidus (“infirm, weak”), from in- (“not”) + validus (“strong”).

Etymology from Wiktionary, CC BY-SA 4.0.