Where does “пиронъ” come from?

пиронъ (Old Church Slavonic) comes from Greek πιρούνι, from Koine Greek περόνιον, from Ancient Greek περόνη, from Ancient Greek πείρω, from Proto-Hellenic *péryō.

Ancestry of “пиронъ”, step by step

Step	Language	Word	Meaning
1	Greek	πιρούνι	fork
2	Koine Greek	περόνιον	—
3	Ancient Greek	περόνη	pin or tongue of a buckle; buckle or brooch...
4	Ancient Greek	πείρω	I pierce, run through; I cleave through
5	Proto-Hellenic	*péryō	—

Words derived from “пиронъ”

piron

Every word from Proto-Hellenic *péryō →Every word from Ancient Greek πείρω →Every word from Ancient Greek περόνη →