"無理難題" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "むりなんだい"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "glosses": [
        "受け入れるのが困難な要求。"
      ],
      "id": "ja-無理難題-ja-noun-lELarDeE"
    },
    {
      "glosses": [
        "解決が難しい問題や課題。"
      ],
      "id": "ja-無理難題-ja-noun-pwQASgHX"
    }
  ],
  "word": "無理難題"
}

{
  "categories": [
    "日本語",
    "日本語 名詞"
  ],
  "forms": [
    {
      "form": "むりなんだい"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "glosses": [
        "受け入れるのが困難な要求。"
      ]
    },
    {
      "glosses": [
        "解決が難しい問題や課題。"
      ]
    }
  ],
  "word": "無理難題"
}