"surbwch" meaning in Welsh

{
  "etymology_text": "From sur (“sour”) with obscure second element.",
  "forms": [
    {
      "form": "surbychod",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "surbychod"
      },
      "expansion": "surbwch m (plural surbychod, not mutable)",
      "name": "cy-noun"
    }
  ],
  "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": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "cy",
          "name": "People",
          "orig": "cy:People",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "surbwchaidd"
        }
      ],
      "glosses": [
        "spoilsport"
      ],
      "id": "en-surbwch-cy-noun-FEO~iAhd",
      "links": [
        [
          "spoilsport",
          "spoilsport"
        ]
      ],
      "synonyms": [
        {
          "word": "lladdwr hwyl"
        }
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    }
  ],
  "word": "surbwch"
}

{
  "derived": [
    {
      "word": "surbwchaidd"
    }
  ],
  "etymology_text": "From sur (“sour”) with obscure second element.",
  "forms": [
    {
      "form": "surbychod",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "surbychod"
      },
      "expansion": "surbwch m (plural surbychod, not mutable)",
      "name": "cy-noun"
    }
  ],
  "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 lemmas",
        "Welsh masculine nouns",
        "Welsh non-mutable terms",
        "Welsh nouns",
        "Welsh nouns with red links in their headword lines",
        "cy:People"
      ],
      "glosses": [
        "spoilsport"
      ],
      "links": [
        [
          "spoilsport",
          "spoilsport"
        ]
      ],
      "synonyms": [
        {
          "word": "lladdwr hwyl"
        }
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    }
  ],
  "word": "surbwch"
}