"sydd" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "wlm",
        "3": "yssyð"
      },
      "expansion": "Middle Welsh yssyð",
      "name": "der"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-bry-pro",
        "3": "*ɨsɨð"
      },
      "expansion": "Proto-Brythonic *ɨsɨð",
      "name": "der"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*esti-yo",
        "t": "who/which is"
      },
      "expansion": "Proto-Celtic *esti-yo (“who/which is”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Middle Welsh yssyð, third-person singular present relative form of bot (“to be”), from Proto-Brythonic *ɨsɨð, from Proto-Celtic *esti-yo (“who/which is”).",
  "forms": [
    {
      "form": "sy",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sydd (not mutable)",
      "name": "cy-verb form"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "bod"
        }
      ],
      "glosses": [
        "third-person singular present relative of bod"
      ],
      "id": "en-sydd-cy-verb-mkU55GTz",
      "links": [
        [
          "relative",
          "relative"
        ],
        [
          "bod",
          "bod#Welsh"
        ]
      ],
      "tags": [
        "form-of",
        "not-mutable",
        "present",
        "relative",
        "singular",
        "third-person"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɨːð/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/siːð/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "rhymes": "-ɨːð"
    }
  ],
  "word": "sydd"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "wlm",
        "3": "yssyð"
      },
      "expansion": "Middle Welsh yssyð",
      "name": "der"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-bry-pro",
        "3": "*ɨsɨð"
      },
      "expansion": "Proto-Brythonic *ɨsɨð",
      "name": "der"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*esti-yo",
        "t": "who/which is"
      },
      "expansion": "Proto-Celtic *esti-yo (“who/which is”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Middle Welsh yssyð, third-person singular present relative form of bot (“to be”), from Proto-Brythonic *ɨsɨð, from Proto-Celtic *esti-yo (“who/which is”).",
  "forms": [
    {
      "form": "sy",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sydd (not mutable)",
      "name": "cy-verb form"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Pages with 3 entries",
        "Pages with entries",
        "Rhymes:Welsh/ɨːð",
        "Rhymes:Welsh/ɨːð/1 syllable",
        "Welsh entries with incorrect language header",
        "Welsh non-lemma forms",
        "Welsh non-mutable terms",
        "Welsh terms derived from Middle Welsh",
        "Welsh terms derived from Proto-Brythonic",
        "Welsh terms derived from Proto-Celtic",
        "Welsh verb forms"
      ],
      "form_of": [
        {
          "word": "bod"
        }
      ],
      "glosses": [
        "third-person singular present relative of bod"
      ],
      "links": [
        [
          "relative",
          "relative"
        ],
        [
          "bod",
          "bod#Welsh"
        ]
      ],
      "tags": [
        "form-of",
        "not-mutable",
        "present",
        "relative",
        "singular",
        "third-person"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɨːð/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/siːð/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "rhymes": "-ɨːð"
    }
  ],
  "word": "sydd"
}