Where does “milpiés” come from?

milpiés (Spanish) comes from Spanish mil, from Old Spanish mil, from Latin Mīlle, from Proto-Italic smīɣeslī, from Proto-Indo-European smih₂ǵʰéslih₂.

milpiés (Spanish): millipede

Definitions

Step	Language	Word	Meaning
1	Spanish	mil	thousand
2	Old Spanish	mil	—
3	Latin	Mīlle	—
4	Proto-Italic	smīɣeslī	—
5	Proto-Indo-European	smih₂ǵʰéslih₂	—

milpiés — Etymology, Origin & Word History | Etymology Explorer