Where does “ultimar” come from?

ultimar (Portuguese) comes from Latin ultimō, from Latin ultimus, from Proto-Italic *oltm̥mos.

ultimar (Portuguese): to finalize, finish

Definitions

Step	Language	Word	Meaning
1	Latin	ultimō	—
2	Latin	ultimus	last, final; furthest, farthest
3	Proto-Italic	*oltm̥mos	—

ultimar — Etymology, Origin & Word History | Etymology Explorer