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suicidal

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adjective British English pronunciation: suicidal /ˌsuːɪˈsaɪd(ə)l/
  1. 1
    someone who is suicidal is likely to try to kill themselves

    When he stopped taking his medication, he became suicidal.

  2. 2
    very dangerous, and likely to lead to serious problems or to death

    Taking on more debt would be suicidal for the company at this time.

    a suicidal parachute jump

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