"droatad" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de noms communs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "troatad",
      "tags": [
        "singular",
        "unmutated"
      ]
    },
    {
      "form": "troatadoù",
      "tags": [
        "plural",
        "unmutated"
      ]
    },
    {
      "form": "droatadoù",
      "tags": [
        "plural",
        "mutation-soft"
      ]
    },
    {
      "form": "zroatad",
      "tags": [
        "singular",
        "mutation-spirant"
      ]
    },
    {
      "form": "zroatadoù",
      "tags": [
        "plural",
        "mutation-spirant"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en breton",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "troatad"
        }
      ],
      "glosses": [
        "Forme mutée de troatad par adoucissement."
      ],
      "id": "fr-droatad-br-noun-rk~NJbIO"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈdrwatː.at\\"
    }
  ],
  "tags": [
    "form-of",
    "masculine"
  ],
  "word": "droatad"
}

{
  "categories": [
    "Formes de noms communs en breton",
    "breton"
  ],
  "forms": [
    {
      "form": "troatad",
      "tags": [
        "singular",
        "unmutated"
      ]
    },
    {
      "form": "troatadoù",
      "tags": [
        "plural",
        "unmutated"
      ]
    },
    {
      "form": "droatadoù",
      "tags": [
        "plural",
        "mutation-soft"
      ]
    },
    {
      "form": "zroatad",
      "tags": [
        "singular",
        "mutation-spirant"
      ]
    },
    {
      "form": "zroatadoù",
      "tags": [
        "plural",
        "mutation-spirant"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en breton"
      ],
      "form_of": [
        {
          "word": "troatad"
        }
      ],
      "glosses": [
        "Forme mutée de troatad par adoucissement."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈdrwatː.at\\"
    }
  ],
  "tags": [
    "form-of",
    "masculine"
  ],
  "word": "droatad"
}