"uphill battle" meaning in English

{
  "forms": [
    {
      "form": "uphill battles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "uphill battle (plural uphill battles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
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          "source": "w"
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          "parents": [
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          "source": "w"
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          "kind": "other",
          "name": "English terms with consonant pseudo-digraphs",
          "parents": [],
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          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
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          "source": "w"
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      ],
      "examples": [
        {
          "ref": "2021 October 11, Jan Hoffman, quoting Uzma Syed, “Boosters Are Complicating Efforts to Persuade the Unvaccinated to Get Shots”, in The New York Times, →ISSN",
          "text": "“It is an uphill battle,” said Dr. Uzma Syed, an infectious disease specialist in Jericho, N.Y., on Long Island, who for months has been giving vaccine education talks to national and international groups.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A challenge with the odds of success stacked strongly against."
      ],
      "id": "en-uphill_battle-en-noun-Tql54uG2",
      "links": [
        [
          "challenge",
          "challenge"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) A challenge with the odds of success stacked strongly against."
      ],
      "related": [
        {
          "word": "Sisyphean labour"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-uphill battle.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/1/16/En-au-uphill_battle.ogg/En-au-uphill_battle.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/1/16/En-au-uphill_battle.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "uphill battle"
}

{
  "forms": [
    {
      "form": "uphill battles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "uphill battle (plural uphill battles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Sisyphean labour"
    }
  ],
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        "English countable nouns",
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        "English terms with consonant pseudo-digraphs",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2021 October 11, Jan Hoffman, quoting Uzma Syed, “Boosters Are Complicating Efforts to Persuade the Unvaccinated to Get Shots”, in The New York Times, →ISSN",
          "text": "“It is an uphill battle,” said Dr. Uzma Syed, an infectious disease specialist in Jericho, N.Y., on Long Island, who for months has been giving vaccine education talks to national and international groups.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A challenge with the odds of success stacked strongly against."
      ],
      "links": [
        [
          "challenge",
          "challenge"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) A challenge with the odds of success stacked strongly against."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-uphill battle.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/1/16/En-au-uphill_battle.ogg/En-au-uphill_battle.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/1/16/En-au-uphill_battle.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "uphill battle"
}