Where does “vert” come from?

vert (Old Occitan) comes from Vulgar Latin virdis, from Latin viridis, from Latin vireō, from Latin -idae.

Ancestry of “vert”, step by step

vert traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Vulgar Latin	virdis	—
2	Latin	viridis	green; young, fresh, lively, youthful
3	Latin	vireō	to be verdant, green; to sprout new green growth
4	Latin	-idae	—

Step	Language	Word	Meaning
1	Vulgar Latin	virdem	—
2	Latin	viridem	accusative masculine singular of viridis;...