"熱心" meaning in Japonais

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en japonais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Japonais",
      "orig": "japonais",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "不熱心"
    },
    {
      "word": "研究熱心"
    }
  ],
  "etymology_texts": [
    "Composé de 熱 (netsu) « fièvre » et de 心 (shin) « cœur »."
  ],
  "forms": [
    {
      "form": "ねっしん",
      "tags": [
        "hiragana"
      ]
    },
    {
      "form": "nesshin",
      "tags": [
        "transcription"
      ]
    }
  ],
  "lang": "Japonais",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en japonais",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "roman": "nesshin ni furansugo o benkyōshitemasu.",
          "text": "熱心にフランス語を勉強してます。",
          "translation": "Il apprend le français avec ferveur."
        }
      ],
      "glosses": [
        "Ferveur."
      ],
      "id": "fr-熱心-ja-noun-M6feo9Ht"
    }
  ],
  "sounds": [
    {
      "ipa": "\\neʃ.ʃin\\"
    }
  ],
  "word": "熱心"
}

{
  "categories": [
    "Noms communs en japonais",
    "japonais"
  ],
  "derived": [
    {
      "word": "不熱心"
    },
    {
      "word": "研究熱心"
    }
  ],
  "etymology_texts": [
    "Composé de 熱 (netsu) « fièvre » et de 心 (shin) « cœur »."
  ],
  "forms": [
    {
      "form": "ねっしん",
      "tags": [
        "hiragana"
      ]
    },
    {
      "form": "nesshin",
      "tags": [
        "transcription"
      ]
    }
  ],
  "lang": "Japonais",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Exemples en japonais"
      ],
      "examples": [
        {
          "roman": "nesshin ni furansugo o benkyōshitemasu.",
          "text": "熱心にフランス語を勉強してます。",
          "translation": "Il apprend le français avec ferveur."
        }
      ],
      "glosses": [
        "Ferveur."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\neʃ.ʃin\\"
    }
  ],
  "word": "熱心"
}