"roc" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "rock"
      },
      "expansion": "English rock",
      "name": "bor"
    }
  ],
  "etymology_text": "From English rock.",
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "roc m (not mutable)",
      "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": "Music",
          "orig": "cy:Music",
          "parents": [
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "rock (style of music)"
      ],
      "id": "en-roc-cy-noun-t5Mjvm-~",
      "links": [
        [
          "rock",
          "rock"
        ]
      ],
      "related": [
        {
          "word": "roc-a-rôl"
        },
        {
          "word": "roc-an-rôl"
        }
      ],
      "synonyms": [
        {
          "word": "cerddoriaeth roc"
        }
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/rɔk/"
    },
    {
      "rhymes": "-ɔk"
    }
  ],
  "word": "roc"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "rock"
      },
      "expansion": "English rock",
      "name": "bor"
    }
  ],
  "etymology_text": "From English rock.",
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "roc m (not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "related": [
    {
      "word": "roc-a-rôl"
    },
    {
      "word": "roc-an-rôl"
    }
  ],
  "senses": [
    {
      "categories": [
        "Rhymes:Welsh/ɔk",
        "Rhymes:Welsh/ɔk/1 syllable",
        "Welsh countable nouns",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh masculine nouns",
        "Welsh non-mutable terms",
        "Welsh nouns",
        "Welsh terms borrowed from English",
        "Welsh terms derived from English",
        "Welsh terms with IPA pronunciation",
        "cy:Music"
      ],
      "glosses": [
        "rock (style of music)"
      ],
      "links": [
        [
          "rock",
          "rock"
        ]
      ],
      "synonyms": [
        {
          "word": "cerddoriaeth roc"
        }
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/rɔk/"
    },
    {
      "rhymes": "-ɔk"
    }
  ],
  "word": "roc"
}