"ddu" meaning in Welsh

{
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "du",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "ddu",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    },
    {
      "form": "nu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "mutated adjective"
      },
      "expansion": "ddu",
      "name": "head"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "du"
      },
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 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"
        }
      ],
      "form_of": [
        {
          "extra": "black",
          "word": "du"
        }
      ],
      "glosses": [
        "Soft mutation of du (“black”)."
      ],
      "id": "en-ddu-cy-adj-Smuf~Dhx",
      "links": [
        [
          "du",
          "du#Welsh"
        ],
        [
          "black",
          "black"
        ]
      ],
      "tags": [
        "form-of",
        "mutation-soft"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ðɨː/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ðiː/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "homophone": "ddi (South Wales)"
    }
  ],
  "word": "ddu"
}

{
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "du",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "ddu",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    },
    {
      "form": "nu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "mutated adjective"
      },
      "expansion": "ddu",
      "name": "head"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "du"
      },
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Welsh entries with incorrect language header",
        "Welsh mutated adjectives",
        "Welsh non-lemma forms",
        "Welsh soft-mutation forms",
        "Welsh terms with homophones"
      ],
      "form_of": [
        {
          "extra": "black",
          "word": "du"
        }
      ],
      "glosses": [
        "Soft mutation of du (“black”)."
      ],
      "links": [
        [
          "du",
          "du#Welsh"
        ],
        [
          "black",
          "black"
        ]
      ],
      "tags": [
        "form-of",
        "mutation-soft"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ðɨː/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ðiː/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "homophone": "ddi (South Wales)"
    }
  ],
  "word": "ddu"
}

{
  "called_from": "inflection/2457",
  "msg": "rejected heuristic header: table cell identified as header and given candidate status, BUT the cleaned text is not in LANGUAGES_WITH_CELLS_AS_HEADERS[Welsh]; cleaned text: nu",
  "path": [
    "ddu"
  ],
  "section": "Welsh",
  "subsection": "adjective",
  "title": "ddu",
  "trace": ""
}

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

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

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