Where does “contradictoirement” come from?

contradictoirement (French) comes from French contradictoire, from Late Latin contradictorius, from Latin contrādīcō, from Latin dīcō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

contradictoirement (French): contradictorily; in the presence of the parties

Definitions

contradictorily; in the presence of the parties

Ancestry of “contradictoirement”, step by step

Step	Language	Word	Meaning
1	French	contradictoire	contradictory
2	Late Latin	contradictorius	contradictory; Containing an objection or...
3	Latin	contrādīcō	to speak or allege against, oppose; contradict, gainsay
4	Latin	dīcō	to say, talk, speak, utter, mention
5	Latin	-tiō	tion, -ation, -ing
6	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
7	Latin	dissertus	arranged, disposed; explained
8	Latin	disserere	second-person singular future passive indicative...
9	Latin	dis-	asunder, apart, in two; reversal, removal;...
10	Latin	calceus	shoe
11	Latin	calx	limestone; chalk; the finish line
12	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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