Etymology

hydracid

H4Y4D2R1A1C3I1D2

Today it means: An acid that does not contain any oxygen; they are all binary compounds of hydrogen plus either a halogen (for example, hydrochloric acid, hydrofluoric acid, hydroiodic acid, hydrobromic acid) or a pseudohalogen. Full definition →

English acid ← French acide ← Latin acidu
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The story

  1. Proto-Indo-European*wed-
  2. Proto-Indo-European*wódr̥
  3. Proto-Hellenic*údōr
  4. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
  5. Ancient Greekῠ̔δρο- (hŭdro-)
  6. Englishhydro-
  7. Proto-Indo-European*h₂eḱ-
  8. Proto-Indo-European*h₂eḱéh₁yeti
  9. Proto-Italic*akēō
  10. Latinaceō
  11. Proto-Indo-European*dʰeh₁-
  12. Latinacidu
  13. Frenchacide
  14. Englishacid
  15. English todayhydracid

From hydro- + acid.

Etymology from Wiktionary, CC BY-SA 4.0.