Where does “contrevengier” come from?

contrevengier (Middle French) comes from Middle French vengier, from Old French vengier, from Latin vindicō, from Latin vindex, from Latin dīcō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

contrevengier (Middle French): to avenge

Definitions

to avenge

Ancestry of “contrevengier”, step by step

contrevengier traces back through two separate lines of ancestry.

via Middle French vengier

Step	Language	Word	Meaning
1	Middle French	vengier	to avenge, to take revenge
2	Old French	vengier	to avenge, to take revenge
3	Latin	vindicō	to lay claim to as one's own (often with sibi)
4	Latin	vindex	claimant, vindicator
5	Latin	dīcō	to say, talk, speak, utter, mention
6	Latin	-tiō	tion, -ation, -ing
7	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
8	Latin	dissertus	arranged, disposed; explained
9	Latin	disserere	second-person singular future passive indicative...
10	Latin	dis-	asunder, apart, in two; reversal, removal;...
11	Latin	calceus	shoe
12	Latin	calx	limestone; chalk; the finish line
13	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via Middle French contre

Step	Language	Word	Meaning
1	Middle French	contre	against; opposing
2	Old French	contre	against
3	Latin	contrā	against
4	Latin	ubī	where? in what place?, in which place?
5	Latin	cubī	—
6	Proto-Italic	*kʷuðei	where

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