Origin of disaccordMiddle English disacorden ; from Old French desacorder: see dis- and amp; 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