Etymology

tetrachloro

T1E1T1R1A1C3H4L1O1R1O1

Today it means: Four chlorine atoms in a compound Full definition →

English chloro- ← Ancient Greek χλωρός (khlōrós) ← Proto-Hellenic *kʰlōrós
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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*ǵʰelh₃-
  7. Proto-Indo-European*ǵʰl̥h₃rós
  8. Proto-Hellenic*kʰlōrós
  9. Ancient Greekχλωρός (khlōrós)
  10. Englishchloro-
  11. English todaytetrachloro

From tetra- + chloro-.

Etymology from Wiktionary, CC BY-SA 4.0.