"ixso" meaning in Gaulois

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en gaulois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots attestés en gaulois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gaulois",
      "orig": "gaulois",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Mot lu dans l’inscription de Châteaubleau (L-90)^([1])^([2])."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "adj",
  "pos_title": "Adjectif",
  "related": [
    {
      "word": "ixsi"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Même."
      ],
      "id": "fr-ixso-gaulois-adj-lOCij23B"
    }
  ],
  "word": "ixso"
}

{
  "categories": [
    "Adjectifs en gaulois",
    "Mots attestés en gaulois",
    "gaulois"
  ],
  "etymology_texts": [
    "Mot lu dans l’inscription de Châteaubleau (L-90)^([1])^([2])."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "adj",
  "pos_title": "Adjectif",
  "related": [
    {
      "word": "ixsi"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Même."
      ]
    }
  ],
  "word": "ixso"
}