"sylff-" meaning in Welsh

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      "expansion": "sylff-",
      "name": "head"
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  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“containing sulfur”), used before a vowel",
          "word": "sylffo-"
        }
      ],
      "categories": [
        {
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
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          "parents": [],
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        },
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          "name": "Welsh entries with incorrect language header",
          "parents": [
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "cy",
          "name": "Sulfur",
          "orig": "cy:Sulfur",
          "parents": [
            "Chalcogens",
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of sylffo- (“containing sulfur”), used before a vowel"
      ],
      "id": "en-sylff--cy-prefix-ENTJP3qE",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "sylffo-",
          "sylffo-#Welsh"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Alternative form of sylffo- (“containing sulfur”), used before a vowel"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "sylff-"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "prefix"
      },
      "expansion": "sylff-",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“containing sulfur”), used before a vowel",
          "word": "sylffo-"
        }
      ],
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        "Pages with entries",
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        "Welsh prefixes",
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        "cy:Sulfur"
      ],
      "glosses": [
        "Alternative form of sylffo- (“containing sulfur”), used before a vowel"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "sylffo-",
          "sylffo-#Welsh"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Alternative form of sylffo- (“containing sulfur”), used before a vowel"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "sylff-"
}