"Brettern" meaning in Allemand

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de noms communs en allemand",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Allemand",
      "orig": "allemand",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Allemand",
  "lang_code": "de",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "form_of": [
        {
          "word": "Brett"
        }
      ],
      "glosses": [
        "Datif pluriel de Brett."
      ],
      "id": "fr-Brettern-de-noun-LXwQM-lI"
    }
  ],
  "sounds": [
    {
      "ipa": "\\bʀɛtɐn\\"
    }
  ],
  "tags": [
    "form-of",
    "neuter"
  ],
  "word": "Brettern"
}

{
  "categories": [
    "Formes de noms communs en allemand",
    "allemand"
  ],
  "lang": "Allemand",
  "lang_code": "de",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "form_of": [
        {
          "word": "Brett"
        }
      ],
      "glosses": [
        "Datif pluriel de Brett."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\bʀɛtɐn\\"
    }
  ],
  "tags": [
    "form-of",
    "neuter"
  ],
  "word": "Brettern"
}