Where does “ínsua” come from?

ínsua (Portuguese) comes from Old Portuguese inssoa, from Latin Īnsula, from Proto-Italic enselā.

ínsua (Portuguese): river islet, eyot

Definitions

Step	Language	Word	Meaning
1	Old Portuguese	inssoa	island
2	Latin	Īnsula	—
3	Proto-Italic	enselā	—

ínsua — Etymology, Origin & Word History | Etymology Explorer