Where does “vertjus” come from?

vertjus (Old French) comes from Old French jus, from Latin iūs, from Latin dīcō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

Ancestry of “vertjus”, step by step

vertjus traces back through two separate lines of ancestry.

via Old French jus

Step	Language	Word	Meaning
1	Old French	jus	juice; down
2	Latin	iūs	law, right
3	Latin	dīcō	to say, talk, speak, utter, mention
4	Latin	-tiō	tion, -ation, -ing
5	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
6	Latin	dissertus	arranged, disposed; explained
7	Latin	disserere	second-person singular future passive indicative...
8	Latin	dis-	asunder, apart, in two; reversal, removal;...
9	Latin	calceus	shoe
10	Latin	calx	limestone; chalk; the finish line
11	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via Old French vert

Step	Language	Word	Meaning
1	Old French	vert	green; green, of a green color
2	Latin	virdis	—
3	Latin	viridis	green; young, fresh, lively, youthful
4	Latin	vireō	to be verdant, green; to sprout new green growth
5	Latin	-idae	—

Words derived from “vertjus”

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →