Etymology

tetrahemihexahedron

Today it means: A concave uniform polyhedron with four triangular faces, three square faces, twelve edges and six vertices. Full definition →

English hexahedron ← Ancient Greek ἡμῐ- (hēmĭ-) ← Proto-Hellenic [Term?]
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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*sem-
  7. Proto-Indo-European*sēmi
  8. Proto-Hellenic[Term?]
  9. Ancient Greekἡμῐ- (hēmĭ-)
  10. Englishhemi-
  11. Englishhexahedron
  12. English todaytetrahemihexahedron

From tetra- + hemi- + hexahedron.

Etymology from Wiktionary, CC BY-SA 4.0.