destabilising

/D IH0 S T EY1 B AH0 L AY0 Z IH0 NG/
verb
  1. 1

    To make something unstable.

  2. 2

    To undermine a government, especially by means of subversion or terrorism.

  3. 3

    To become unstable.

Source: https://en.wiktionary.org/wiki/destabilise, https://en.wiktionary.org/wiki/destabilising