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sister-in-law noun

  /ˈsɪs.tə.ɪn.lɔː/ , /ˈsɪs.tɚ.ɪn.lɔ/
  • The wife of the sibling of one's spouse.
 belle-sœur
  • The sister of one's spouse.
  • (less common) Co-sister-in-law: The wife of one's sibling-in-law.
 belle-sœur, belle-soeur
co-sister-in-law
co-belle-sœur
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