Where does “serpente” come from?

serpente (Portuguese) comes from Old Portuguese serpente, from Latin serpēns, from Latin serpō, from Proto-Indo-European serp- — to creep, crawl.

serpente (Portuguese): serpent

Definitions

Step	Language	Word	Meaning
1	Old Portuguese	serpente	—
2	Latin	serpēns	—
3	Latin	serpō	—
4	Proto-Indo-European	serp-	to creep, crawl

serpente — Etymology, Origin & Word History | Etymology Explorer