"ffydd" meaning in Gallois

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en gallois issus d’un mot en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en gallois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gallois",
      "orig": "gallois",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "translation": "religion",
      "word": "crefydd"
    },
    {
      "translation": "fidèle",
      "word": "ffyddlon"
    },
    {
      "translation": "fidélité",
      "word": "ffyddlondeb"
    }
  ],
  "etymology_texts": [
    "Du latin fides, apparenté au breton feiz."
  ],
  "forms": [
    {
      "form": "ffyddau",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "ffyddiau",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en gallois de la religion",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en gallois",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Foi."
      ],
      "id": "fr-ffydd-cy-noun-C7kIeUiP",
      "topics": [
        "religion"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\fɨːð\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "ffydd"
}

{
  "categories": [
    "Mots en gallois issus d’un mot en latin",
    "Noms communs en gallois",
    "gallois"
  ],
  "derived": [
    {
      "translation": "religion",
      "word": "crefydd"
    },
    {
      "translation": "fidèle",
      "word": "ffyddlon"
    },
    {
      "translation": "fidélité",
      "word": "ffyddlondeb"
    }
  ],
  "etymology_texts": [
    "Du latin fides, apparenté au breton feiz."
  ],
  "forms": [
    {
      "form": "ffyddau",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "ffyddiau",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en gallois de la religion",
        "Wiktionnaire:Exemples manquants en gallois"
      ],
      "glosses": [
        "Foi."
      ],
      "topics": [
        "religion"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\fɨːð\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "ffydd"
}