Etymology

tetrahydride

T1E1T1R1A1H4Y4D2R1I1D2E1

Today it means: Any hydride containing four atoms of hydrogen per molecule Full definition →

English hydride ← Proto-Indo-European *dʰeh₁- ← Ancient Greek ῠ̔δρο- (hŭdro-)
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The story

  1. Proto-Indo-European*kʷetwóres
  2. Proto-Hellenic*kʷétwores
  3. Ancient Greekτέσσᾰρες (téssăres)
  4. Ancient Greekτετρᾰ- (tetră-)
  5. Englishtetra-
  6. Proto-Indo-European*wed-
  7. Proto-Indo-European*wódr̥
  8. Proto-Hellenic*údōr
  9. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
  10. Ancient Greekῠ̔δρο- (hŭdro-)
  11. Englishhydro-
  12. Proto-Indo-European*dʰeh₁-
  13. Englishhydride
  14. English todaytetrahydride

From tetra- + hydride.

Etymology from Wiktionary, CC BY-SA 4.0.