English word exauthorize comes from English authorize, English ex-

Detailed word origin of exauthorize

Dictionary entry	Language	Definition
authorize	English (eng)	(transitive) To grant (someone) the permission or power necessary to do (something).. (transitive) To permit (something), to sanction or consent to (something).
ex-	English (eng)	(biology) Lacking.. Former, but still living (almost always used with a hyphen). Out of. Outside.
exauthorize	English (eng)	(obsolete, transitive) To deprive of authority.

Words with the same origin as exauthorize