Where does “idéal” come from?

idéal (French) comes from Latin ideālis, from Latin idea, from Ancient Greek ἰδέα, from Ancient Greek εἴδω, from Proto-Indo-European weyd- — to see.

idéal (French): ideal

Definitions

Step	Language	Word	Meaning
1	Latin	ideālis	—
2	Latin	idea	idea; prototype
3	Ancient Greek	ἰδέα	form, shape; look, appearance, semblance; type,...
4	Ancient Greek	εἴδω	to see; I see
5	Proto-Indo-European	weyd-	to see

idéal — Etymology, Origin & Word History | Etymology Explorer