secede

verb

1. (intransitive)To split from or to withdraw from membership of a political union, an alliance or an organisation.

   “We can secede from the United Kingdom any time we want.”

   ““The horror, the horror”, said venture capitalist Shervin Pishevar, an Uber investor who made a call for California to secede from the US.”

2. (transitive, uncommon)To split or to withdraw one or more constituent entities from membership of a political union, an alliance or an organisation.

   “At the same time, Nolan also secretly contracted with the crafty United States Army general James Wilkinson to organize some men to secede Texas from Spanish America.”

   “A Spanish Supreme Court probe into last year's attempt to secede Catalonia from Spain wraps up Friday with the judge expected to charge 28 regional politicians and separatist leaders with offenses that may include rebellion.”