Where does “perciturus” come from?

perciturus (Latin) comes from Latin percieo, from Latin per-, from Proto-Italic peri-.

Definitions

Step	Language	Word	Meaning
1	Latin	percieo	I move, rouse, stir up or excite greatly; I call...
2	Latin	per-	Used to make adjectives or verbs that are "very"...
3	Proto-Italic	peri-	—

perciturus — Etymology, Origin & Word History | Etymology Explorer