"na úkor" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "preposition"
      },
      "expansion": "na úkor",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Czech entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Czech prepositions",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Czech terms with collocations",
          "parents": [
            "Terms with collocations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "udělat na úkor",
          "type": "example"
        },
        {
          "english": "to act against the interest of someone",
          "text": "jednat na úkor čích zájmů",
          "type": "example"
        }
      ],
      "glosses": [
        "at the expense of"
      ],
      "id": "en-na_úkor-cs-prep-ReWx2zlL",
      "links": [
        [
          "at the expense of",
          "at the expense of"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[na uːkor]"
    }
  ],
  "word": "na úkor"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "preposition"
      },
      "expansion": "na úkor",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "Czech entries with incorrect language header",
        "Czech lemmas",
        "Czech multiword terms",
        "Czech prepositions",
        "Czech terms with IPA pronunciation",
        "Czech terms with collocations",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for translations of Czech usage examples"
      ],
      "examples": [
        {
          "text": "udělat na úkor",
          "type": "example"
        },
        {
          "english": "to act against the interest of someone",
          "text": "jednat na úkor čích zájmů",
          "type": "example"
        }
      ],
      "glosses": [
        "at the expense of"
      ],
      "links": [
        [
          "at the expense of",
          "at the expense of"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[na uːkor]"
    }
  ],
  "word": "na úkor"
}