Where does “pib” come from?

pib (Welsh) comes from Vulgar Latin pipa, from Latin pipo — I pip, peep.

pib (Welsh): pipe; tube; diarrhea

Definitions

Step	Language	Word	Meaning
1	Vulgar Latin	pipa	pipe
2	Latin	pipo	I pip, peep

pib — Etymology, Origin & Word History | Etymology Explorer