"blwyddyn naid" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "leap year"
      },
      "expansion": "Calque of English leap year",
      "name": "clq"
    }
  ],
  "etymology_text": "Calque of English leap year.",
  "forms": [
    {
      "form": "blynyddoedd naid",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "blynyddoedd naid"
      },
      "expansion": "blwyddyn naid m (plural blynyddoedd naid)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "cy",
          "name": "Calendar",
          "orig": "cy:Calendar",
          "parents": [
            "Timekeeping",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "March 1st is the 60th day of the year in the Gregorian calendar (61st in leap years).",
          "text": "1 Mawrth yw'r 60fed dydd o'r flwyddyn yng Nghalendr Gregori (61ain mewn blynyddoedd naid).",
          "type": "example"
        }
      ],
      "glosses": [
        "leap year"
      ],
      "id": "en-blwyddyn_naid-cy-noun-DSJ7ga4e",
      "links": [
        [
          "leap year",
          "leap year"
        ]
      ],
      "related": [
        {
          "word": "diwrnod naid"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "blwyddyn naid"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "leap year"
      },
      "expansion": "Calque of English leap year",
      "name": "clq"
    }
  ],
  "etymology_text": "Calque of English leap year.",
  "forms": [
    {
      "form": "blynyddoedd naid",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "blynyddoedd naid"
      },
      "expansion": "blwyddyn naid m (plural blynyddoedd naid)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "related": [
    {
      "word": "diwrnod naid"
    }
  ],
  "senses": [
    {
      "categories": [
        "Welsh countable nouns",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh masculine nouns",
        "Welsh multiword terms",
        "Welsh nouns",
        "Welsh nouns with red links in their headword lines",
        "Welsh terms calqued from English",
        "Welsh terms derived from English",
        "Welsh terms with usage examples",
        "cy:Calendar"
      ],
      "examples": [
        {
          "english": "March 1st is the 60th day of the year in the Gregorian calendar (61st in leap years).",
          "text": "1 Mawrth yw'r 60fed dydd o'r flwyddyn yng Nghalendr Gregori (61ain mewn blynyddoedd naid).",
          "type": "example"
        }
      ],
      "glosses": [
        "leap year"
      ],
      "links": [
        [
          "leap year",
          "leap year"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "blwyddyn naid"
}