"дуу" meaning in Buryat

{
  "forms": [
    {
      "form": "duu",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "bua",
        "2": "noun"
      },
      "expansion": "дуу • (duu)",
      "name": "head"
    }
  ],
  "lang": "Buryat",
  "lang_code": "bua",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Buryat entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Buryat entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "bua",
          "name": "Family",
          "orig": "bua:Family",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "younger brother or sister"
      ],
      "id": "en-дуу-bua-noun-xyx6fPuk",
      "links": [
        [
          "younger",
          "younger"
        ],
        [
          "brother",
          "brother"
        ],
        [
          "or",
          "or"
        ],
        [
          "sister",
          "sister"
        ]
      ]
    }
  ],
  "word": "дуу"
}

{
  "forms": [
    {
      "form": "duu",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "bua",
        "2": "noun"
      },
      "expansion": "дуу • (duu)",
      "name": "head"
    }
  ],
  "lang": "Buryat",
  "lang_code": "bua",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Buryat entries with incorrect language header",
        "Buryat entries with topic categories using raw markup",
        "Buryat lemmas",
        "Buryat nouns",
        "bua:Family"
      ],
      "glosses": [
        "younger brother or sister"
      ],
      "links": [
        [
          "younger",
          "younger"
        ],
        [
          "brother",
          "brother"
        ],
        [
          "or",
          "or"
        ],
        [
          "sister",
          "sister"
        ]
      ]
    }
  ],
  "word": "дуу"
}