"di" meaning in Proto-Brythonic

{
  "categories": [
    {
      "_dis": "0 0",
      "kind": "other",
      "name": "Proto-Brythonic entries with incorrect language header",
      "parents": [
        "Entries with incorrect language header",
        "Entry maintenance"
      ],
      "source": "w+disamb"
    }
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "br",
            "2": "da"
          },
          "expansion": "Breton: da",
          "name": "desc"
        }
      ],
      "text": "Breton: da"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "kw",
            "2": "dhe"
          },
          "expansion": "Cornish: dhe",
          "name": "desc"
        }
      ],
      "text": "Cornish: dhe"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "owl",
            "2": "di"
          },
          "expansion": "Old Welsh: di",
          "name": "desc"
        }
      ],
      "text": "Old Welsh: di"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "wlm",
            "2": "y",
            "t": "to, for"
          },
          "expansion": "Middle Welsh: y (“to, for”)",
          "name": "desc"
        }
      ],
      "text": "Middle Welsh: y (“to, for”)"
    },
    {
      "depth": 3,
      "templates": [
        {
          "args": {
            "1": "cy",
            "2": "i",
            "t": "to, for"
          },
          "expansion": "Welsh: i (“to, for”)",
          "name": "desc"
        }
      ],
      "text": "Welsh: i (“to, for”)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "cel-pro",
        "3": "*dū"
      },
      "expansion": "Proto-Celtic *dū",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Celtic *dū.",
  "head_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "preposition"
      },
      "expansion": "*di",
      "name": "head"
    }
  ],
  "lang": "Proto-Brythonic",
  "lang_code": "cel-bry-pro",
  "original_title": "Reconstruction:Proto-Brythonic/di",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Proto-Brythonic prepositions",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "to"
      ],
      "id": "en-di-cel-bry-pro-prep-Zj6hv~~l",
      "links": [
        [
          "to",
          "to"
        ]
      ],
      "tags": [
        "reconstruction"
      ]
    },
    {
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Proto-Brythonic prepositions",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "for"
      ],
      "id": "en-di-cel-bry-pro-prep-EMIrz0x2",
      "links": [
        [
          "for",
          "for"
        ]
      ],
      "tags": [
        "reconstruction"
      ]
    }
  ],
  "word": "di"
}

{
  "categories": [
    "Proto-Brythonic entries with incorrect language header",
    "Proto-Brythonic lemmas",
    "Proto-Brythonic prepositions",
    "Proto-Brythonic terms derived from Proto-Celtic",
    "Proto-Brythonic terms inherited from Proto-Celtic"
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "br",
            "2": "da"
          },
          "expansion": "Breton: da",
          "name": "desc"
        }
      ],
      "text": "Breton: da"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "kw",
            "2": "dhe"
          },
          "expansion": "Cornish: dhe",
          "name": "desc"
        }
      ],
      "text": "Cornish: dhe"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "owl",
            "2": "di"
          },
          "expansion": "Old Welsh: di",
          "name": "desc"
        }
      ],
      "text": "Old Welsh: di"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "wlm",
            "2": "y",
            "t": "to, for"
          },
          "expansion": "Middle Welsh: y (“to, for”)",
          "name": "desc"
        }
      ],
      "text": "Middle Welsh: y (“to, for”)"
    },
    {
      "depth": 3,
      "templates": [
        {
          "args": {
            "1": "cy",
            "2": "i",
            "t": "to, for"
          },
          "expansion": "Welsh: i (“to, for”)",
          "name": "desc"
        }
      ],
      "text": "Welsh: i (“to, for”)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "cel-pro",
        "3": "*dū"
      },
      "expansion": "Proto-Celtic *dū",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Celtic *dū.",
  "head_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "preposition"
      },
      "expansion": "*di",
      "name": "head"
    }
  ],
  "lang": "Proto-Brythonic",
  "lang_code": "cel-bry-pro",
  "original_title": "Reconstruction:Proto-Brythonic/di",
  "pos": "prep",
  "senses": [
    {
      "glosses": [
        "to"
      ],
      "links": [
        [
          "to",
          "to"
        ]
      ],
      "tags": [
        "reconstruction"
      ]
    },
    {
      "glosses": [
        "for"
      ],
      "links": [
        [
          "for",
          "for"
        ]
      ],
      "tags": [
        "reconstruction"
      ]
    }
  ],
  "word": "di"
}