"bau" meaning in Welsh

{
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "pau",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "bau",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    },
    {
      "form": "mhau",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "phau",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "mutated noun"
      },
      "expansion": "bau",
      "name": "head"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "pau"
      },
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 24 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "_dis": "6 5 6 5 6 6 5 5 6 4 6 1 1 7 4 0 1 1 0 0 0 0 0 6 6 2 1 0 0 0 0 0 6 0 0",
          "kind": "other",
          "name": "Pages with 24 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "6 5 6 5 6 6 5 5 6 4 6 1 2 7 4 0 1 1 0 0 0 0 0 6 6 3 1 0 0 0 0 0 6 0 0",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 4 4 3 4 5 3 5 5 4 4 1 4 8 2 0 4 1 0 1 1 0 1 4 4 4 4 1 0 0 0 2 8 0 1",
          "kind": "other",
          "name": "West Coast Bajau entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "pau"
        }
      ],
      "glosses": [
        "Soft mutation of pau."
      ],
      "id": "en-bau-cy-noun-AmuxblWJ",
      "links": [
        [
          "pau",
          "pau#Welsh"
        ]
      ],
      "tags": [
        "form-of",
        "mutation-soft"
      ]
    }
  ],
  "word": "bau"
}

{
  "categories": [
    "Pages with 24 entries",
    "Pages with entries",
    "West Coast Bajau adjectives",
    "West Coast Bajau entries with incorrect language header",
    "West Coast Bajau lemmas",
    "West Coast Bajau terms derived from Proto-Austronesian",
    "West Coast Bajau terms derived from Proto-Malayo-Polynesian",
    "West Coast Bajau terms inherited from Proto-Austronesian",
    "West Coast Bajau terms inherited from Proto-Malayo-Polynesian"
  ],
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "pau",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "bau",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    },
    {
      "form": "mhau",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "phau",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "mutated noun"
      },
      "expansion": "bau",
      "name": "head"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "pau"
      },
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 24 entries",
        "Pages with entries",
        "Welsh entries with incorrect language header",
        "Welsh mutated nouns",
        "Welsh non-lemma forms",
        "Welsh soft-mutation forms"
      ],
      "form_of": [
        {
          "word": "pau"
        }
      ],
      "glosses": [
        "Soft mutation of pau."
      ],
      "links": [
        [
          "pau",
          "pau#Welsh"
        ]
      ],
      "tags": [
        "form-of",
        "mutation-soft"
      ]
    }
  ],
  "word": "bau"
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: bau/Welsh 'radical' base_tags=set()",
  "path": [
    "bau"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "bau",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: bau/Welsh 'nasal' base_tags={'soft', 'error-unrecognized-form'}",
  "path": [
    "bau"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "bau",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: bau/Welsh 'aspirate' base_tags={'soft', 'error-unrecognized-form'}",
  "path": [
    "bau"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "bau",
  "trace": ""
}