The story
- Proto-Indo-European*pleh₁-
- Proto-Indo-European*polh₁ús
- Ancient Greekπολῠ́ς (polŭ́s)
- Englishpoly-
- Ancient Greekθέσις (thésis)
- English todaypolythetic
From poly- + Ancient Greek θέσις (thésis, “arrangement”) + English -ic.
Etymology from Wiktionary, CC BY-SA 4.0.