"llysywen bendoll y môr" meaning in Welsh

{
  "forms": [
    {
      "form": "llysywod pendoll y môr",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "llysywen bendoll y môr",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "lysywen bendoll y môr",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "llysywod pendoll y môr",
        "head": "llysywen bendoll y môr"
      },
      "expansion": "llysywen bendoll y môr f (plural llysywod pendoll y môr)",
      "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": "Jawless fish",
          "orig": "cy:Jawless fish",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "sea lamprey (Lampetra marinus)"
      ],
      "id": "en-llysywen_bendoll_y_môr-cy-noun-Xlje~RYW",
      "links": [
        [
          "sea lamprey",
          "sea lamprey"
        ],
        [
          "Cymdeithas Edward Llwyd",
          "w:Cymdeithas Edward Llwyd"
        ],
        [
          "Y Lolfa",
          "w:Y Lolfa"
        ]
      ],
      "synonyms": [
        {
          "word": "môr-lysywen"
        }
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "llysywen bendoll y môr"
}

{
  "forms": [
    {
      "form": "llysywod pendoll y môr",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "llysywen bendoll y môr",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "lysywen bendoll y môr",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "llysywod pendoll y môr",
        "head": "llysywen bendoll y môr"
      },
      "expansion": "llysywen bendoll y môr f (plural llysywod pendoll y môr)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Entries using missing taxonomic name (species)",
        "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:Jawless fish"
      ],
      "glosses": [
        "sea lamprey (Lampetra marinus)"
      ],
      "links": [
        [
          "sea lamprey",
          "sea lamprey"
        ],
        [
          "Cymdeithas Edward Llwyd",
          "w:Cymdeithas Edward Llwyd"
        ],
        [
          "Y Lolfa",
          "w:Y Lolfa"
        ]
      ],
      "synonyms": [
        {
          "word": "môr-lysywen"
        }
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "llysywen bendoll y môr"
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: llysywen bendoll y môr/Welsh 'radical' base_tags=set()",
  "path": [
    "llysywen bendoll y môr"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llysywen bendoll y môr",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: llysywen bendoll y môr/Welsh 'nasal' base_tags={'error-unrecognized-form', 'soft'}",
  "path": [
    "llysywen bendoll y môr"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llysywen bendoll y môr",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: llysywen bendoll y môr/Welsh 'aspirate' base_tags={'error-unrecognized-form', 'soft'}",
  "path": [
    "llysywen bendoll y môr"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llysywen bendoll y môr",
  "trace": ""
}