Where does “umbiigo” come from?

umbiigo (Old Portuguese) comes from Latin umbilīcus, from Proto-Indo-European *h₃nóbʰōl.

Ancestry of “umbiigo”, step by step

Step	Language	Word	Meaning
1	Latin	umbilīcus	—
2	Proto-Indo-European	*h₃nóbʰōl	—

umbiigo — Etymology, Origin & Word History | Etymology Explorer