"syrthni" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "swrth",
        "3": "-ni",
        "t1": "lazy"
      },
      "expansion": "swrth (“lazy”) + -ni",
      "name": "af"
    }
  ],
  "etymology_text": "From swrth (“lazy”) + -ni.",
  "forms": [
    {
      "form": "swrthni",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mf",
        "2": "-"
      },
      "expansion": "syrthni m or f (uncountable, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "51 49",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "47 53",
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "sluggishness, lethargy"
      ],
      "id": "en-syrthni-cy-noun-HdIXfMXW",
      "links": [
        [
          "sluggishness",
          "sluggishness"
        ],
        [
          "lethargy",
          "lethargy"
        ]
      ],
      "synonyms": [
        {
          "word": "marweidd-dra"
        },
        {
          "word": "cysgadrwydd"
        },
        {
          "word": "diogi"
        },
        {
          "word": "difaterwch"
        }
      ],
      "tags": [
        "feminine",
        "masculine",
        "not-mutable",
        "uncountable"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "cy",
          "name": "Physics",
          "orig": "cy:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "41 59",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "51 49",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "47 53",
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "39 61",
          "kind": "other",
          "name": "Welsh terms suffixed with -ni",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "inertia"
      ],
      "id": "en-syrthni-cy-noun-SknDsgNa",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "inertia",
          "inertia"
        ]
      ],
      "raw_glosses": [
        "(physics) inertia"
      ],
      "tags": [
        "feminine",
        "masculine",
        "not-mutable",
        "uncountable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsərθnɪ/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ˈsərθni/",
      "tags": [
        "South-Wales"
      ]
    }
  ],
  "word": "syrthni"
}

{
  "categories": [
    "Pages with 1 entry",
    "Pages with entries",
    "Welsh entries with incorrect language header",
    "Welsh feminine nouns",
    "Welsh lemmas",
    "Welsh masculine nouns",
    "Welsh non-mutable terms",
    "Welsh nouns",
    "Welsh nouns with multiple genders",
    "Welsh terms suffixed with -ni",
    "Welsh uncountable nouns"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "swrth",
        "3": "-ni",
        "t1": "lazy"
      },
      "expansion": "swrth (“lazy”) + -ni",
      "name": "af"
    }
  ],
  "etymology_text": "From swrth (“lazy”) + -ni.",
  "forms": [
    {
      "form": "swrthni",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mf",
        "2": "-"
      },
      "expansion": "syrthni m or f (uncountable, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "sluggishness, lethargy"
      ],
      "links": [
        [
          "sluggishness",
          "sluggishness"
        ],
        [
          "lethargy",
          "lethargy"
        ]
      ],
      "synonyms": [
        {
          "word": "marweidd-dra"
        },
        {
          "word": "cysgadrwydd"
        },
        {
          "word": "diogi"
        },
        {
          "word": "difaterwch"
        }
      ],
      "tags": [
        "feminine",
        "masculine",
        "not-mutable",
        "uncountable"
      ]
    },
    {
      "categories": [
        "cy:Physics"
      ],
      "glosses": [
        "inertia"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "inertia",
          "inertia"
        ]
      ],
      "raw_glosses": [
        "(physics) inertia"
      ],
      "tags": [
        "feminine",
        "masculine",
        "not-mutable",
        "uncountable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsərθnɪ/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ˈsərθni/",
      "tags": [
        "South-Wales"
      ]
    }
  ],
  "word": "syrthni"
}