"backem" meaning in Czech

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "noun form"
      },
      "expansion": "backem",
      "name": "head"
    }
  ],
  "hyphenation": [
    "ba‧ckem"
  ],
  "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"
        }
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "1955, Jaroslav Hašek, Črty: povídky a humoresky z cest, page 573",
          "text": "S křídel kopejme do centra, centr podá na druhé křídlo, centr běží kupředu, dribling s backem a malý trik, podá se na pravé křídlo schoot a gól!",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "word": "back"
        }
      ],
      "glosses": [
        "instrumental singular of back"
      ],
      "id": "en-backem-cs-noun-PJh9s4tp",
      "links": [
        [
          "back",
          "back#Czech"
        ]
      ],
      "synonyms": [
        {
          "word": "bekem"
        }
      ],
      "tags": [
        "form-of",
        "instrumental",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈbɛkɛm]"
    },
    {
      "homophone": "bekem"
    }
  ],
  "word": "backem"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "noun form"
      },
      "expansion": "backem",
      "name": "head"
    }
  ],
  "hyphenation": [
    "ba‧ckem"
  ],
  "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",
        "Czech terms with homophones",
        "Czech terms with quotations",
        "Requests for translations of Czech quotations"
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "1955, Jaroslav Hašek, Črty: povídky a humoresky z cest, page 573",
          "text": "S křídel kopejme do centra, centr podá na druhé křídlo, centr běží kupředu, dribling s backem a malý trik, podá se na pravé křídlo schoot a gól!",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "word": "back"
        }
      ],
      "glosses": [
        "instrumental singular of back"
      ],
      "links": [
        [
          "back",
          "back#Czech"
        ]
      ],
      "tags": [
        "form-of",
        "instrumental",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈbɛkɛm]"
    },
    {
      "homophone": "bekem"
    }
  ],
  "synonyms": [
    {
      "word": "bekem"
    }
  ],
  "word": "backem"
}