Where does “Pi” come from?

Pi is a Chinese word 郫 of unknown origin and meaning.

Ancestry of “Pi”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	πῖ	Alternative form of πεῖ
2	Ancient Greek	πεῖ	pi, the name for the sixteenth letter Π, π of the...
3	Proto-Semitic	pay-	the mouth

Pi — Etymology, Origin & Word History | Etymology Explorer