"dubis" meaning in Gaulois

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes d’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"
    }
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Étymologies en gaulois incluant une reconstruction",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Nominatif féminin singulier de *dubus."
      ],
      "id": "fr-dubis-gaulois-adj-fSIhOlIE"
    }
  ],
  "sounds": [
    {
      "ipa": "*\\du.bis\\"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "dubis"
}

{
  "categories": [
    "Formes d’adjectifs en gaulois",
    "Mots attestés en gaulois",
    "gaulois"
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        "Étymologies en gaulois incluant une reconstruction"
      ],
      "glosses": [
        "Nominatif féminin singulier de *dubus."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "*\\du.bis\\"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "dubis"
}