"gwyach yddfgoch" meaning in Welsh

{
  "etymology_text": "gwyach (“grebe”) + gyddfgoch (“red-necked, red-throated”).",
  "forms": [
    {
      "form": "gwyachod gyddfgoch",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "gwyach yddfgoch",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "wyach yddfgoch",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    },
    {
      "form": "ngwyach yddfgoch",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "gwyach wddfgoch",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "gwyachod gyddfgoch",
        "head": "gwyach yddfgoch"
      },
      "expansion": "gwyach yddfgoch f (plural gwyachod gyddfgoch)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "cy",
          "name": "Grebes",
          "orig": "cy:Grebes",
          "parents": [
            "Freshwater birds",
            "Birds",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "red-necked grebe (Podiceps grisegena)"
      ],
      "id": "en-gwyach_yddfgoch-cy-noun-yPgdh54r",
      "links": [
        [
          "red-necked grebe",
          "red-necked grebe"
        ],
        [
          "Podiceps grisegena",
          "Podiceps grisegena#Translingual"
        ],
        [
          "Peter Hayman",
          "w:Peter Hayman (ornithologist)"
        ],
        [
          "Rob Hume",
          "w:Rob Hume"
        ],
        [
          "Iolo Williams",
          "w:Iolo Williams"
        ],
        [
          "Gwasg Carreg Gwalch",
          "w:Gwasg Carreg Gwalch"
        ]
      ],
      "tags": [
        "feminine"
      ],
      "wikipedia": [
        "cy:gwyach yddfgoch"
      ]
    }
  ],
  "word": "gwyach yddfgoch"
}

{
  "etymology_text": "gwyach (“grebe”) + gyddfgoch (“red-necked, red-throated”).",
  "forms": [
    {
      "form": "gwyachod gyddfgoch",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "gwyach yddfgoch",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "wyach yddfgoch",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    },
    {
      "form": "ngwyach yddfgoch",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "gwyach wddfgoch",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "gwyachod gyddfgoch",
        "head": "gwyach yddfgoch"
      },
      "expansion": "gwyach yddfgoch f (plural gwyachod gyddfgoch)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Welsh countable nouns",
        "Welsh entries with incorrect language header",
        "Welsh feminine nouns",
        "Welsh lemmas",
        "Welsh multiword terms",
        "Welsh nouns",
        "Welsh nouns with red links in their headword lines",
        "cy:Grebes"
      ],
      "glosses": [
        "red-necked grebe (Podiceps grisegena)"
      ],
      "links": [
        [
          "red-necked grebe",
          "red-necked grebe"
        ],
        [
          "Podiceps grisegena",
          "Podiceps grisegena#Translingual"
        ],
        [
          "Peter Hayman",
          "w:Peter Hayman (ornithologist)"
        ],
        [
          "Rob Hume",
          "w:Rob Hume"
        ],
        [
          "Iolo Williams",
          "w:Iolo Williams"
        ],
        [
          "Gwasg Carreg Gwalch",
          "w:Gwasg Carreg Gwalch"
        ]
      ],
      "tags": [
        "feminine"
      ],
      "wikipedia": [
        "cy:gwyach yddfgoch"
      ]
    }
  ],
  "word": "gwyach yddfgoch"
}