Etymology

pentasulphide

P3E1N1T1A1S1U1L1P3H4I1D2E1

Today it means: any sulphide containing five sulphur atoms in each molecule Full definition →

English sulphide ← Ancient Greek πεντᾰ- (pentă-) ← Proto-Hellenic *pénkʷe
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The story

  1. Proto-Indo-European*pénkʷe
  2. Proto-Hellenic*pénkʷe
  3. Ancient Greekπέντε (pénte)
  4. Ancient Greekπεντᾰ- (pentă-)
  5. Englishpenta-
  6. Englishsulphide
  7. English todaypentasulphide

From penta- + sulphide.

Etymology from Wiktionary, CC BY-SA 4.0.