Where does “metipsimus” come from?

metipsimus (Latin) comes from Latin metipsissimus, from Latin ipse, from Proto-Italic *e(s)peso.

metipsimus (Latin): same

Definitions

Step	Language	Word	Meaning
1	Latin	metipsissimus	—
2	Latin	ipse	himself, herself, itself, the very, the actual;...
3	Proto-Italic	*e(s)peso	—

metipsimus — Etymology, Origin & Word History | Etymology Explorer