Etymology

pentaphosphide

P3E1N1T1A1P3H4O1S1P3H4I1D2E1

Today it means: Any phosphide containing five phosphorus atoms Full definition →

English phosphide ← 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. Englishphosphide
  7. English todaypentaphosphide

From penta- + phosphide.

Etymology from Wiktionary, CC BY-SA 4.0.