Where does “contradictory” come from?

Contradictory comes from Late Latin contradictorius, formed from Latin contradico meaning to speak against, from contra meaning against and rota meaning wheel, both ultimately from Proto-Indo-European roots ret- and deyḱ-.

contradictory (English): That contradicts something, such as an argument;...

Definitions

That contradicts something, such as an argument;...

Ancestry of “contradictory”, step by step

Step	Language	Word	Meaning
1	Latin	contrādictōrius	Containing an objection or contradiction, contradictory
2	Latin	contrādīcō	to speak or allege against, oppose; contradict, gainsay
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

Words derived from “contradictory”

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