"þau" meaning in Proto-Germanic

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "efþau"
    },
    {
      "_dis1": "0 0",
      "word": "ehþau"
    },
    {
      "_dis1": "0 0",
      "word": "þauh"
    },
    {
      "_dis1": "0 0",
      "word": "ufþau"
    },
    {
      "_dis1": "0 0",
      "word": "uþþau"
    }
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "got",
            "2": "𐌸𐌰𐌿"
          },
          "expansion": "Gothic: 𐌸𐌰𐌿 (þau)",
          "name": "desc"
        }
      ],
      "text": "Gothic: 𐌸𐌰𐌿 (þau)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "gem-pro",
        "2": "ine-pro",
        "3": "*to-",
        "t": "that"
      },
      "expansion": "Proto-Indo-European *to- (“that”)",
      "name": "inh"
    }
  ],
  "etymology_text": "From pre-Germanic *to-we, \"or that/than\", from Proto-Indo-European *to- (“that”) + *-we (“or”).",
  "head_templates": [
    {
      "args": {
        "1": "gem-pro",
        "2": "East Germanic"
      },
      "expansion": "(East Germanic)",
      "name": "tlb"
    }
  ],
  "lang": "Proto-Germanic",
  "lang_code": "gem-pro",
  "original_title": "Reconstruction:Proto-Germanic/þau",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "_dis": "50 1 1 1 1 45 0",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "East Proto-Germanic",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Proto-Germanic entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "in that case"
      ],
      "id": "en-þau-gem-pro-adv-Jp1dxAos",
      "links": [
        [
          "in that case",
          "in that case"
        ]
      ],
      "tags": [
        "East",
        "Germanic",
        "reconstruction"
      ]
    },
    {
      "glosses": [
        "than"
      ],
      "id": "en-þau-gem-pro-adv-c4NxHBsF",
      "links": [
        [
          "than",
          "than"
        ]
      ],
      "raw_glosses": [
        "(after comparative) than"
      ],
      "raw_tags": [
        "after comparative"
      ],
      "tags": [
        "East",
        "Germanic",
        "reconstruction"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/θɑu̯/"
    }
  ],
  "word": "þau"
}

{
  "categories": [
    "East Proto-Germanic",
    "Pages with 1 entry",
    "Pages with entries",
    "Proto-Germanic adverbs",
    "Proto-Germanic entries with incorrect language header",
    "Proto-Germanic lemmas",
    "Proto-Germanic terms derived from Proto-Indo-European",
    "Proto-Germanic terms inherited from Proto-Indo-European"
  ],
  "derived": [
    {
      "word": "efþau"
    },
    {
      "word": "ehþau"
    },
    {
      "word": "þauh"
    },
    {
      "word": "ufþau"
    },
    {
      "word": "uþþau"
    }
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "got",
            "2": "𐌸𐌰𐌿"
          },
          "expansion": "Gothic: 𐌸𐌰𐌿 (þau)",
          "name": "desc"
        }
      ],
      "text": "Gothic: 𐌸𐌰𐌿 (þau)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "gem-pro",
        "2": "ine-pro",
        "3": "*to-",
        "t": "that"
      },
      "expansion": "Proto-Indo-European *to- (“that”)",
      "name": "inh"
    }
  ],
  "etymology_text": "From pre-Germanic *to-we, \"or that/than\", from Proto-Indo-European *to- (“that”) + *-we (“or”).",
  "head_templates": [
    {
      "args": {
        "1": "gem-pro",
        "2": "East Germanic"
      },
      "expansion": "(East Germanic)",
      "name": "tlb"
    }
  ],
  "lang": "Proto-Germanic",
  "lang_code": "gem-pro",
  "original_title": "Reconstruction:Proto-Germanic/þau",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "in that case"
      ],
      "links": [
        [
          "in that case",
          "in that case"
        ]
      ],
      "tags": [
        "East",
        "Germanic",
        "reconstruction"
      ]
    },
    {
      "glosses": [
        "than"
      ],
      "links": [
        [
          "than",
          "than"
        ]
      ],
      "raw_glosses": [
        "(after comparative) than"
      ],
      "raw_tags": [
        "after comparative"
      ],
      "tags": [
        "East",
        "Germanic",
        "reconstruction"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/θɑu̯/"
    }
  ],
  "word": "þau"
}