Etymology

humidify

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Today it means: To increase the humidity in the air. Full definition →

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

  1. Proto-Italic*ūmo-
  2. Latinūmeō
  3. Proto-Indo-European*dʰeh₁-
  4. Latinūmidus
  5. Latinhūmidus
  6. Old Frenchhumide
  7. Englishhumid
  8. Proto-Indo-European*dʰeh₁-
  9. Proto-Italic*θakos
  10. English todayhumidify

From humid + -ify.

Etymology from Wiktionary, CC BY-SA 4.0.