Where does “erbicida” come from?

erbicida (Italian) comes from Italian -cida, from Latin -cīda, from Latin -a, from Proto-Italic -ā, from Proto-Indo-European -éh₂.

erbicida (Italian): herbicidal

Definitions

Step	Language	Word	Meaning
1	Italian	-cida	-cide; -cidal
2	Latin	-cīda	—
3	Latin	-a	suffixed to the roots of verbs, forms agent...
4	Proto-Italic	-ā	Forms masculine agent nouns from prefixed or compounded bases
5	Proto-Indo-European	-éh₂	—