The story
- Proto-Indo-European*pleh₁-
- Proto-Indo-European*polh₁ús
- Ancient Greekπολῠ́ς (polŭ́s)
- Englishpoly-
- Englishchlorotrifluoroethylene
- English todaypolychlorotrifluoroethylene
From poly- + chlorotrifluoroethylene.
Etymology from Wiktionary, CC BY-SA 4.0.