"deirvet" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes d’adjectifs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "teirvet",
      "tags": [
        "unmutated"
      ]
    },
    {
      "form": "zeirvet",
      "tags": [
        "mutation-spirant"
      ]
    },
    {
      "form": "drivet",
      "raw_tags": [
        "le masculin"
      ],
      "source": "form line template 'équiv-pour'"
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en breton",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Fañch an Uhel, Kontadennoù ar Bobl /5, Éditions Al Liamm, 1994, page 102",
          "text": "En un deirvet kambr e wel ur briñsez kaer war ur gwele.",
          "translation": "Dans une troisième chambre il voit une belle princesse sur un lit."
        }
      ],
      "form_of": [
        {
          "word": "teirvet"
        }
      ],
      "glosses": [
        "Forme mutée de teirvet par adoucissement (t > d)."
      ],
      "id": "fr-deirvet-br-adj-I7DzVTXk"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈdɛ(j)r.vet\\"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "deirvet"
}

{
  "categories": [
    "Formes d’adjectifs en breton",
    "breton"
  ],
  "forms": [
    {
      "form": "teirvet",
      "tags": [
        "unmutated"
      ]
    },
    {
      "form": "zeirvet",
      "tags": [
        "mutation-spirant"
      ]
    },
    {
      "form": "drivet",
      "raw_tags": [
        "le masculin"
      ],
      "source": "form line template 'équiv-pour'"
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        "Exemples en breton"
      ],
      "examples": [
        {
          "ref": "Fañch an Uhel, Kontadennoù ar Bobl /5, Éditions Al Liamm, 1994, page 102",
          "text": "En un deirvet kambr e wel ur briñsez kaer war ur gwele.",
          "translation": "Dans une troisième chambre il voit une belle princesse sur un lit."
        }
      ],
      "form_of": [
        {
          "word": "teirvet"
        }
      ],
      "glosses": [
        "Forme mutée de teirvet par adoucissement (t > d)."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈdɛ(j)r.vet\\"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "deirvet"
}