"řeku" meaning in Czech

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "noun form"
      },
      "expansion": "řeku",
      "name": "head"
    }
  ],
  "hyphenation": [
    "ře‧ku"
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "noun",
  "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"
        }
      ],
      "form_of": [
        {
          "word": "řeka"
        }
      ],
      "glosses": [
        "accusative singular of řeka"
      ],
      "id": "en-řeku-cs-noun-Vs2tFw8z",
      "links": [
        [
          "řeka",
          "řeka#Czech"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈr̝ɛku]"
    },
    {
      "rhymes": "-ɛku"
    }
  ],
  "word": "řeku"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "noun form"
      },
      "expansion": "řeku",
      "name": "head"
    }
  ],
  "hyphenation": [
    "ře‧ku"
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Czech entries with incorrect language header",
        "Czech non-lemma forms",
        "Czech noun forms",
        "Czech terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:Czech/ɛku",
        "Rhymes:Czech/ɛku/2 syllables"
      ],
      "form_of": [
        {
          "word": "řeka"
        }
      ],
      "glosses": [
        "accusative singular of řeka"
      ],
      "links": [
        [
          "řeka",
          "řeka#Czech"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈr̝ɛku]"
    },
    {
      "rhymes": "-ɛku"
    }
  ],
  "word": "řeku"
}