"sièd" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "shed"
      },
      "expansion": "English shed",
      "name": "bor"
    }
  ],
  "etymology_text": "From English shed.",
  "forms": [
    {
      "form": "siediau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "siediau"
      },
      "expansion": "sièd f (plural siediau, 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"
        }
      ],
      "glosses": [
        "shed (temporary structure)"
      ],
      "id": "en-sièd-cy-noun-Mx17~6C-",
      "links": [
        [
          "shed",
          "shed"
        ]
      ],
      "tags": [
        "feminine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʃɛd/"
    },
    {
      "rhymes": "-ɛd"
    }
  ],
  "word": "sièd"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "shed"
      },
      "expansion": "English shed",
      "name": "bor"
    }
  ],
  "etymology_text": "From English shed.",
  "forms": [
    {
      "form": "siediau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "siediau"
      },
      "expansion": "sièd f (plural siediau, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Rhymes:Welsh/ɛd",
        "Rhymes:Welsh/ɛd/1 syllable",
        "Welsh countable nouns",
        "Welsh entries with incorrect language header",
        "Welsh feminine nouns",
        "Welsh lemmas",
        "Welsh non-mutable terms",
        "Welsh nouns",
        "Welsh nouns with red links in their headword lines",
        "Welsh terms borrowed from English",
        "Welsh terms derived from English",
        "Welsh terms spelled with È",
        "Welsh terms spelled with ◌̀",
        "Welsh terms with IPA pronunciation"
      ],
      "glosses": [
        "shed (temporary structure)"
      ],
      "links": [
        [
          "shed",
          "shed"
        ]
      ],
      "tags": [
        "feminine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʃɛd/"
    },
    {
      "rhymes": "-ɛd"
    }
  ],
  "word": "sièd"
}