Where does “gnomide” come from?

gnomide (French) comes from French -ide, from Middle French -ide, from Latin -is, from Latin -a, from Proto-Italic -ā, from Proto-Indo-European -éh₂.

gnomide (French): gnomide

Definitions

Step	Language	Word	Meaning
1	French	-ide	id (dynast)
2	Middle French	-ide	id (dynast)
3	Latin	-is	suffixed to the root of nouns in composition,...
4	Latin	-a	suffixed to the roots of verbs, forms agent...
5	Proto-Italic	-ā	Forms masculine agent nouns from prefixed or compounded bases
6	Proto-Indo-European	-éh₂	—