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raison d'être noun

  /ˌɹeɪzɒ̃ ˈdɛtɹə/ , /ˌɹɛzɒ̃ ˈdɛtɹə/
  • Reason for being. The claimed reason for the existence of something or someone; the sole or ultimate purpose of something or someone.
 смысл существова́ния
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