Where does “centō” come from?

centō (Latin) comes from Ancient Greek κέντρον, from Proto-Hellenic *kéntron, from Proto-Indo-European *ḱéntrom.

Ancestry of “centō”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κέντρον	Something with a sharp point: point, spike, spur;...
2	Proto-Hellenic	*kéntron	—
3	Proto-Indo-European	*ḱéntrom	—

centō — Etymology, Origin & Word History | Etymology Explorer