Where does “polygōnum” come from?

polygōnum (Late Latin) comes from Ancient Greek πολύγωνον, from Ancient Greek πολύγωνος, from Ancient Greek γωνία, from Ancient Greek γόνυ, from Proto-Hellenic gónu, from Proto-Indo-European ǵónu — knee.

Ancestry of “polygōnum”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	πολύγωνον	polygon
2	Ancient Greek	πολύγωνος	polygonal, many-angled
3	Ancient Greek	γωνία	corner, angle; joiner's square; cornerstone
4	Ancient Greek	γόνυ	knee
5	Proto-Hellenic	gónu	knee
6	Proto-Indo-European	ǵónu	knee

Words derived from “polygōnum”

poligono
poligonale
poligonu

Every word from Proto-Indo-European ǵónu →Every word from Proto-Hellenic gónu →Every word from Ancient Greek γόνυ →