"pětku" meaning in Czech

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "noun form"
      },
      "expansion": "pětku",
      "name": "head"
    }
  ],
  "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 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "56 16 27",
          "kind": "other",
          "name": "Lower Sorbian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "88 5 7",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "90 4 6",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "pětka"
        }
      ],
      "glosses": [
        "accusative singular of pětka"
      ],
      "id": "en-pětku-cs-noun--F2sSC-b",
      "links": [
        [
          "pětka",
          "pětka#Czech"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈpjɛtku]"
    }
  ],
  "word": "pětku"
}

{
  "categories": [
    "Lower Sorbian entries with incorrect language header",
    "Lower Sorbian non-lemma forms",
    "Lower Sorbian noun forms",
    "Pages with 2 entries",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "noun form"
      },
      "expansion": "pětku",
      "name": "head"
    }
  ],
  "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 2 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "word": "pětka"
        }
      ],
      "glosses": [
        "accusative singular of pětka"
      ],
      "links": [
        [
          "pětka",
          "pětka#Czech"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈpjɛtku]"
    }
  ],
  "word": "pětku"
}