Where does “πολυμέρεια” come from?

πολυμέρεια (Greek) comes from Greek πολυ-, from Ancient Greek πολύς, from Ancient Greek πόρος, from Ancient Greek πείρω, from Proto-Hellenic *péryō.

πολυμέρεια (Greek): multilateralism

Definitions

Step	Language	Word	Meaning
1	Greek	πολυ-	multi-, poly-
2	Ancient Greek	πολύς	many, a lot of; neuter πολύ or πολλά as...
3	Ancient Greek	πόρος	a means of passage, passageway, way, opening;...
4	Ancient Greek	πείρω	I pierce, run through; I cleave through
5	Proto-Hellenic	*péryō	—