Where does “saturare” come from?

saturare (Latin) comes from Latin satur, from Proto-Indo-European seh₂- — to satiate, satisfy.

Ancestry of “saturare”, step by step

Step	Language	Word	Meaning
1	Latin	satur	full, sated; well-fed, replete; saturated
2	Proto-Indo-European	seh₂-	to satiate, satisfy

saturare — Etymology, Origin & Word History | Etymology Explorer