Where does “gengiva” come from?

gengiva (Portuguese) comes from Old Portuguese gengiva, from Latin gingīva, from Proto-Indo-European ǵyewh₁- — to chew.

gengiva (Portuguese): gum

Definitions

Step	Language	Word	Meaning
1	Old Portuguese	gengiva	—
2	Latin	gingīva	—
3	Proto-Indo-European	ǵyewh₁-	to chew

gengiva — Etymology, Origin & Word History | Etymology Explorer