"eskern" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de noms communs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Pluriels internes en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Pluriel interne de askorn, obtenu par inflexion a > e et o > e."
  ],
  "forms": [
    {
      "form": "askorn",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en breton",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              22,
              28
            ]
          ],
          "ref": "Anatol ar Braz, Mojenn an Ankou, traduit par Erwan ar Moal, Mouladurioù Hor Yezh, 1986, page 56",
          "text": "Ar garnel a oa leun a eskern.",
          "translation": "L’ossuaire était plein d’ossements."
        }
      ],
      "form_of": [
        {
          "word": "askorn"
        }
      ],
      "glosses": [
        "Pluriel de askorn."
      ],
      "id": "fr-eskern-br-noun-e10Adpx6"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈes.kɛrn\\"
    }
  ],
  "tags": [
    "form-of",
    "masculine"
  ],
  "word": "eskern"
}

{
  "categories": [
    "Formes de noms communs en breton",
    "Pluriels internes en breton",
    "breton"
  ],
  "etymology_texts": [
    "Pluriel interne de askorn, obtenu par inflexion a > e et o > e."
  ],
  "forms": [
    {
      "form": "askorn",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "categories": [
        "Exemples en breton"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              22,
              28
            ]
          ],
          "ref": "Anatol ar Braz, Mojenn an Ankou, traduit par Erwan ar Moal, Mouladurioù Hor Yezh, 1986, page 56",
          "text": "Ar garnel a oa leun a eskern.",
          "translation": "L’ossuaire était plein d’ossements."
        }
      ],
      "form_of": [
        {
          "word": "askorn"
        }
      ],
      "glosses": [
        "Pluriel de askorn."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈes.kɛrn\\"
    }
  ],
  "tags": [
    "form-of",
    "masculine"
  ],
  "word": "eskern"
}