"аки" meaning in Nivkh

{
  "etymology_templates": [
    {
      "args": {
        "1": "evn",
        "2": "акин"
      },
      "expansion": "Evenki акин (akin)",
      "name": "cog"
    },
    {
      "args": {
        "1": "mn",
        "2": "ах"
      },
      "expansion": "Mongolian ах (ax)",
      "name": "cog"
    }
  ],
  "etymology_text": "Proto-Nivkh *akan, *aki.\nPossibly related to Proto-Tungusic *ake; compare Evenki акин (akin), Mongolic *aka, compare Mongolian ах (ax), and also Ainu アㇰ (ak, “younger brother”).",
  "forms": [
    {
      "form": "aki",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "niv",
        "2": "noun"
      },
      "expansion": "аки (aki)",
      "name": "head"
    }
  ],
  "lang": "Nivkh",
  "lang_code": "niv",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "East Sakhalin Nivkh",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Nivkh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "niv",
          "name": "Male family members",
          "orig": "niv:Male family members",
          "parents": [
            "Family members",
            "Male people",
            "Family",
            "Male",
            "People",
            "Gender",
            "Human",
            "Biology",
            "Psychology",
            "Sociology",
            "All topics",
            "Sciences",
            "Social sciences",
            "Fundamental",
            "Society"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "elder brother; big brother"
      ],
      "id": "en-аки-niv-noun-scZA~7j8",
      "links": [
        [
          "elder brother",
          "elder brother"
        ],
        [
          "big brother",
          "big brother"
        ]
      ],
      "raw_glosses": [
        "(East Sakhalin) elder brother; big brother"
      ],
      "synonyms": [
        {
          "roman": "əkəəkən",
          "tags": [
            "North",
            "Sakhalin"
          ],
          "word": "ыкыыкын"
        },
        {
          "roman": "əkʼən",
          "tags": [
            "North",
            "Sakhalin"
          ],
          "word": "ыкʼын"
        },
        {
          "roman": "akan",
          "tags": [
            "Sakhalin",
            "South"
          ],
          "word": "акан"
        },
        {
          "roman": "akand",
          "tags": [
            "East",
            "Sakhalin"
          ],
          "word": "аканд"
        },
        {
          "roman": "akad",
          "tags": [
            "East",
            "Sakhalin"
          ],
          "word": "акад"
        },
        {
          "roman": "əkən",
          "tags": [
            "Amur"
          ],
          "word": "ыкын"
        },
        {
          "roman": "əkəd̦",
          "tags": [
            "Amur"
          ],
          "word": "ыкыдь"
        }
      ],
      "tags": [
        "East",
        "Sakhalin"
      ]
    }
  ],
  "word": "аки"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "evn",
        "2": "акин"
      },
      "expansion": "Evenki акин (akin)",
      "name": "cog"
    },
    {
      "args": {
        "1": "mn",
        "2": "ах"
      },
      "expansion": "Mongolian ах (ax)",
      "name": "cog"
    }
  ],
  "etymology_text": "Proto-Nivkh *akan, *aki.\nPossibly related to Proto-Tungusic *ake; compare Evenki акин (akin), Mongolic *aka, compare Mongolian ах (ax), and also Ainu アㇰ (ak, “younger brother”).",
  "forms": [
    {
      "form": "aki",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "niv",
        "2": "noun"
      },
      "expansion": "аки (aki)",
      "name": "head"
    }
  ],
  "lang": "Nivkh",
  "lang_code": "niv",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "East Sakhalin Nivkh",
        "Nivkh entries with incorrect language header",
        "Nivkh lemmas",
        "Nivkh nouns",
        "niv:Male family members"
      ],
      "glosses": [
        "elder brother; big brother"
      ],
      "links": [
        [
          "elder brother",
          "elder brother"
        ],
        [
          "big brother",
          "big brother"
        ]
      ],
      "raw_glosses": [
        "(East Sakhalin) elder brother; big brother"
      ],
      "tags": [
        "East",
        "Sakhalin"
      ]
    }
  ],
  "synonyms": [
    {
      "roman": "əkəəkən",
      "tags": [
        "North",
        "Sakhalin"
      ],
      "word": "ыкыыкын"
    },
    {
      "roman": "əkʼən",
      "tags": [
        "North",
        "Sakhalin"
      ],
      "word": "ыкʼын"
    },
    {
      "roman": "akan",
      "tags": [
        "Sakhalin",
        "South"
      ],
      "word": "акан"
    },
    {
      "roman": "akand",
      "tags": [
        "East",
        "Sakhalin"
      ],
      "word": "аканд"
    },
    {
      "roman": "akad",
      "tags": [
        "East",
        "Sakhalin"
      ],
      "word": "акад"
    },
    {
      "roman": "əkən",
      "tags": [
        "Amur"
      ],
      "word": "ыкын"
    },
    {
      "roman": "əkəd̦",
      "tags": [
        "Amur"
      ],
      "word": "ыкыдь"
    }
  ],
  "word": "аки"
}