destabilise destabilise /diːˈsteɪbəˌlaɪz/

verb

1. [British] Make unstable  ( destabilise [British] , destabilize )
   make unstable
    Terrorism destabilized the government
   Terrorism destabilized the government
   
2. [British] Become unstable  ( destabilise [British] , destabilize )
   become unstable
    The economy destabilized rapidly
   The economy destabilized rapidly