Where does “jumento” come from?

jumento (Spanish) comes from Latin iumentum, from Old Latin iouxmentom, from Proto-Italic jouksmentom.

jumento (Spanish): donkey; idiot; fool

Definitions

Step	Language	Word	Meaning
1	Latin	iumentum	A draft animal, a beast of burden, a large...
2	Old Latin	iouxmentom	—
3	Proto-Italic	jouksmentom	—

jumento — Etymology, Origin & Word History | Etymology Explorer