désétablir
Désétablir is a French verb that means to undo an established state or position, or to destabilize and remove someone or something from its established status. The prefix dés- signals reversal or negation, applied here to the verb établir, which means to establish or set up. Thus désétablir conveys the act of withdrawing what has been established or of making an institution, rule, or arrangement cease to be established.
Usage and nuance: the term is relatively formal and appears mainly in political, administrative, or analytical
Conjugation and style notes: désétablir follows the pattern of étabLIR with the same irregular endings characteristic