Old French

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Noun

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avoistre oblique singularm (oblique plural avoistres, nominative singular avoistres, nominative plural avoistre)

  1. adulterous man
  2. bastard (child born outside of wedlock)

Noun

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avoistre oblique singularf (oblique plural avoistres, nominative singular avoistre, nominative plural avoistres)

  1. adulterous woman