Origin of disaccordMiddle English disacorden from Old French desacorder: see dis- and accord
intransitive verbdis·ac·cord·ed, dis·ac·cord·ing, dis·ac·cords
Origin of disaccordFrom Middle English disaccorden to disagree from Old French desacorder des- dis- acorder to agree ; see accord .
(third-person singular simple present disaccords, present participle disaccording, simple past and past participle disaccorded)
From Middle English disacorden, from Anglo-Norman desacorder