"menyw" meaning in Gallois

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de noms communs en gallois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gallois",
      "orig": "gallois",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "benyw",
      "tags": [
        "singular",
        "unmutated"
      ]
    },
    {
      "form": "benywod",
      "tags": [
        "plural",
        "unmutated"
      ]
    },
    {
      "form": "fenyw",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "singular"
      ]
    },
    {
      "form": "fenywod",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "plural"
      ]
    },
    {
      "form": "menywod",
      "raw_tags": [
        "Nasalisation"
      ],
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "form_of": [
        {
          "word": "benyw"
        }
      ],
      "glosses": [
        "Forme mutée de benyw par nasalisation."
      ],
      "id": "fr-menyw-cy-noun-DTT2ZS2W"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈmɛnɪu\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "menyw"
}

{
  "categories": [
    "Formes de noms communs en gallois",
    "gallois"
  ],
  "forms": [
    {
      "form": "benyw",
      "tags": [
        "singular",
        "unmutated"
      ]
    },
    {
      "form": "benywod",
      "tags": [
        "plural",
        "unmutated"
      ]
    },
    {
      "form": "fenyw",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "singular"
      ]
    },
    {
      "form": "fenywod",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "plural"
      ]
    },
    {
      "form": "menywod",
      "raw_tags": [
        "Nasalisation"
      ],
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "form_of": [
        {
          "word": "benyw"
        }
      ],
      "glosses": [
        "Forme mutée de benyw par nasalisation."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈmɛnɪu\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "menyw"
}