Where does “unghiatura” come from?

unghiatura (Italian) comes from Italian unghiato, from Italian unghia, from Vulgar Latin ungla, from Latin ungula, from Latin unguis, from Proto-Indo-European h₃negʰ- — nail.

unghiatura (Italian): tab; crown; chamfer, bevel; scratch

Definitions

tab; crown; chamfer, bevel; scratch

Ancestry of “unghiatura”, step by step

Step	Language	Word	Meaning
1	Italian	unghiato	clawed, taloned
2	Italian	unghia	nail, claw
3	Vulgar Latin	ungla	—
4	Latin	ungula	hoof, claw; a horse; an aromatic spice
5	Latin	unguis	fingernail, toenail; claw; hoof
6	Proto-Indo-European	h₃negʰ-	nail

Every word from Proto-Indo-European h₃negʰ- →Every word from Latin unguis →Every word from Latin ungula →