harakiri

/HH AA1 R IH0 K IH1 R IY0/
noun
  1. 1

    Ceremonial suicide by disembowelment, as by slicing open the abdomen with a dagger or knife: formerly practised in Japan by the Samurai when disgraced or sentenced to death.

  2. 2

    Suicide or any suicidal action.

  3. 3

    (by extension) An act against one's own interests.

Synonyms

Source: https://en.wiktionary.org/wiki/hara-kiri, https://en.wiktionary.org/wiki/harakiri