self torture

/ˌsɛlfˈtɔrtʃər/
noun
  1. The act of causing oneself severe mental or physical pain, often deliberately or obsessively.
    • The prisoner's self-torture through starvation was a protest against the conditions.
    • In the story, the hero's self-torture over his lost love drives him to isolation.
    • Dwelling on every small failure is a form of self-torture that harms your well-being.
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