"kvák" meaning in Czech

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "interjection"
      },
      "expansion": "kvák",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Czech entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "cs",
          "name": "Animal sounds",
          "orig": "cs:Animal sounds",
          "parents": [
            "Sounds",
            "Vocalizations",
            "Sound",
            "Communication",
            "Energy",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "croak (the cry of a frog or toad)"
      ],
      "id": "en-kvák-cs-intj-aXF4fwJs",
      "links": [
        [
          "croak",
          "croak"
        ]
      ],
      "related": [
        {
          "word": "kvakot"
        },
        {
          "word": "kvákat"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈkvaːk]"
    }
  ],
  "word": "kvák"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "interjection"
      },
      "expansion": "kvák",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "intj",
  "related": [
    {
      "word": "kvakot"
    },
    {
      "word": "kvákat"
    }
  ],
  "senses": [
    {
      "categories": [
        "Czech entries with incorrect language header",
        "Czech interjections",
        "Czech lemmas",
        "Czech terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "cs:Animal sounds"
      ],
      "glosses": [
        "croak (the cry of a frog or toad)"
      ],
      "links": [
        [
          "croak",
          "croak"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈkvaːk]"
    }
  ],
  "word": "kvák"
}