"fino al midollo" meaning in Italian

{
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        "1": "down to the marrow"
      },
      "expansion": "“down to the marrow”",
      "name": "m-g"
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      "args": {
        "1": "down to the marrow"
      },
      "expansion": "Literally, “down to the marrow”",
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    {
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        "2": "jusqu'à la moelle"
      },
      "expansion": "French jusqu'à la moelle",
      "name": "cog"
    }
  ],
  "etymology_text": "Literally, “down to the marrow”. Compare French jusqu'à la moelle.",
  "forms": [
    {
      "form": "fino all'osso",
      "tags": [
        "alternative"
      ]
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      "expansion": "fino al midollo",
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  "lang": "Italian",
  "lang_code": "it",
  "pos": "prep_phrase",
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          "english": "The American population seems \"Keynesian\" to the bone.",
          "ref": "2020 October 26, Federico Rampini, “Americani popolo di consumatori: chi risparmia deprime la crescita [Americans population of consumers: who saves deprives [economic] growth]”, in la Repubblica:",
          "text": "Il popolo americano sembra \"keynesiano\" fino al midollo.",
          "translation": "The American population seems \"Keynesian\" to the bone.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "to the bone"
      ],
      "id": "en-fino_al_midollo-it-prep_phrase-QHUBHpwP",
      "links": [
        [
          "to the bone",
          "to the bone"
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      "raw_glosses": [
        "(idiomatic) to the bone"
      ],
      "synonyms": [
        {
          "word": "nell'intimo"
        },
        {
          "word": "nel profondo"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "fino al midollo"
}

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        "2": "l",
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      "expansion": "L",
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    {
      "args": {
        "1": "down to the marrow"
      },
      "expansion": "“down to the marrow”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "down to the marrow"
      },
      "expansion": "Literally, “down to the marrow”",
      "name": "lit"
    },
    {
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        "2": "jusqu'à la moelle"
      },
      "expansion": "French jusqu'à la moelle",
      "name": "cog"
    }
  ],
  "etymology_text": "Literally, “down to the marrow”. Compare French jusqu'à la moelle.",
  "forms": [
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      "form": "fino all'osso",
      "tags": [
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          "english": "The American population seems \"Keynesian\" to the bone.",
          "ref": "2020 October 26, Federico Rampini, “Americani popolo di consumatori: chi risparmia deprime la crescita [Americans population of consumers: who saves deprives [economic] growth]”, in la Repubblica:",
          "text": "Il popolo americano sembra \"keynesiano\" fino al midollo.",
          "translation": "The American population seems \"Keynesian\" to the bone.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "to the bone"
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          "to the bone",
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        "(idiomatic) to the bone"
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  "word": "fino al midollo"
}