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regret noun

  /ɹiˈɡɹɛt/ , /ɹəˈɡɹɛt/ , /ɹɪˈɡɹɛt/
  • Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing.
  • (decision theory) The amount of avoidable loss that results from choosing the wrong action.
 後悔

regret verb

  /ɹiˈɡɹɛt/ , /ɹəˈɡɹɛt/ , /ɹɪˈɡɹɛt/
  • To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead.
 後悔, 悔いる, 残念
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