Where does “saburro” come from?

saburro (Latin) comes from Latin saburra, from Latin sabulum, from Proto-Indo-European sámh₂dʰos, from Proto-Indo-European sem- — together, one.

saburro (Latin): I ballast a vessel; I cram full, stuff full

Definitions

Step	Language	Word	Meaning
1	Latin	saburra	grit, sand
2	Latin	sabulum	Alternative form of sabulō; gravel, sand; sand,...
3	Proto-Indo-European	sámh₂dʰos	sand
4	Proto-Indo-European	sem-	together, one