"ak" meaning in Aïnou (Japon)

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en aïnou (Japon)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Aïnou (Japon)",
      "orig": "aïnou (Japon)",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Aïnou (Japon)",
  "lang_code": "ain",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "glosses": [
        "Le frère cadet."
      ],
      "id": "fr-ak-ain-noun-Ali0aHxG"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ak\\"
    }
  ],
  "word": "ak"
}

{
  "categories": [
    "Noms communs en aïnou (Japon)",
    "aïnou (Japon)"
  ],
  "lang": "Aïnou (Japon)",
  "lang_code": "ain",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "glosses": [
        "Le frère cadet."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ak\\"
    }
  ],
  "word": "ak"
}