"fi" meaning in Welsh

{
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*mī"
      },
      "expansion": "Proto-Celtic *mī",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Celtic *mī.",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "pronoun",
        "cat2": "personal pronouns"
      },
      "expansion": "fi",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "kind": "other",
          "name": "Welsh personal pronouns",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "kind": "other",
          "name": "Welsh pronouns",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "I, me"
      ],
      "id": "en-fi-cy-pron-QtscG1eb",
      "links": [
        [
          "I",
          "I"
        ],
        [
          "me",
          "me"
        ]
      ],
      "related": [
        {
          "english": "I, me",
          "translation": "I, me",
          "word": "i"
        },
        {
          "english": "I, me",
          "translation": "I, me",
          "word": "mi"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/viː/"
    },
    {
      "rhymes": "-iː"
    }
  ],
  "word": "fi"
}

{
  "etymology_number": 2,
  "forms": [
    {
      "form": "fiau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "fiau"
      },
      "expansion": "fi f (plural fiau, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Welsh terms with redundant script codes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "cy",
          "name": "Latin letter names",
          "orig": "cy:Latin letter names",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The name of the Latin-script letter V/v."
      ],
      "id": "en-fi-cy-noun-iQdgKlD3",
      "links": [
        [
          "V",
          "V#Welsh"
        ],
        [
          "v",
          "v#Welsh"
        ]
      ],
      "tags": [
        "feminine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/viː/"
    },
    {
      "rhymes": "-iː"
    }
  ],
  "word": "fi"
}

{
  "categories": [
    "Pages with 28 entries",
    "Pages with entries",
    "Rhymes:Welsh/iː",
    "Rhymes:Welsh/iː/1 syllable",
    "Welsh countable nouns",
    "Welsh entries with incorrect language header",
    "Welsh feminine nouns",
    "Welsh lemmas",
    "Welsh non-mutable terms",
    "Welsh nouns",
    "Welsh personal pronouns",
    "Welsh pronouns",
    "Welsh terms derived from Proto-Celtic",
    "Welsh terms inherited from Proto-Celtic"
  ],
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*mī"
      },
      "expansion": "Proto-Celtic *mī",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Celtic *mī.",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "pronoun",
        "cat2": "personal pronouns"
      },
      "expansion": "fi",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "pron",
  "related": [
    {
      "english": "I, me",
      "translation": "I, me",
      "word": "i"
    },
    {
      "english": "I, me",
      "translation": "I, me",
      "word": "mi"
    }
  ],
  "senses": [
    {
      "glosses": [
        "I, me"
      ],
      "links": [
        [
          "I",
          "I"
        ],
        [
          "me",
          "me"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/viː/"
    },
    {
      "rhymes": "-iː"
    }
  ],
  "word": "fi"
}

{
  "categories": [
    "Pages with 28 entries",
    "Pages with entries",
    "Rhymes:Welsh/iː",
    "Rhymes:Welsh/iː/1 syllable",
    "Welsh countable nouns",
    "Welsh entries with incorrect language header",
    "Welsh feminine nouns",
    "Welsh lemmas",
    "Welsh non-mutable terms",
    "Welsh nouns"
  ],
  "etymology_number": 2,
  "forms": [
    {
      "form": "fiau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "fiau"
      },
      "expansion": "fi f (plural fiau, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Welsh terms with redundant script codes",
        "cy:Latin letter names"
      ],
      "glosses": [
        "The name of the Latin-script letter V/v."
      ],
      "links": [
        [
          "V",
          "V#Welsh"
        ],
        [
          "v",
          "v#Welsh"
        ]
      ],
      "tags": [
        "feminine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/viː/"
    },
    {
      "rhymes": "-iː"
    }
  ],
  "word": "fi"
}