late 14c., obsequi, in plural, "funeral rites, a funeral," from Anglo-French obsequie, Old French obseque, osseque "funeral rites" and directly from Medieval Latin obsequiae, influenced in sense by confusion of Latin obsequium "compliance" (see obsequious) with exsequiae "funeral rites." Typically in plural, obsequies.
<a href="https://www.etymonline.com/word/obsequies">Etymology of obsequies by etymonline</a>
Harper, D. (n.d.). Etymology of obsequies. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/obsequies