Etymology

validify

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Today it means: To validate. Full definition →

Proto-Italic *θakos ← Proto-Indo-European *dʰeh₁- ← English valid
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The story

  1. Proto-Indo-European*h₂welh₁-
  2. Proto-Indo-European*h₂wl̥h₁éh₁yeti
  3. Proto-Italic*walēō
  4. Latinvaleō
  5. Proto-Indo-European*dʰeh₁-
  6. Latinvalidus
  7. Middle Frenchvalide
  8. Englishvalid
  9. Proto-Indo-European*dʰeh₁-
  10. Proto-Italic*θakos
  11. English todayvalidify

From valid + -ify.

Etymology from Wiktionary, CC BY-SA 4.0.