"comme un poisson dans l'eau" meaning in French

{
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      "args": {
        "1": "like a fish in water"
      },
      "expansion": "“like a fish in water”",
      "name": "m-g"
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      "args": {
        "1": "like a fish in water"
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      "expansion": "Literally, “like a fish in water”",
      "name": "lit"
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    {
      "args": {
        "1": "oc",
        "2": "coma un peis dins l'aiga"
      },
      "expansion": "Occitan coma un peis dins l'aiga",
      "name": "cog"
    }
  ],
  "etymology_text": "Literally, “like a fish in water”. Cognate with Occitan coma un peis dins l'aiga. Compare also the antonymous English idiom like a fish out of water.",
  "forms": [
    {
      "form": "comme un poisson dans l’ eau",
      "tags": [
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  "lang": "French",
  "lang_code": "fr",
  "pos": "prep_phrase",
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      "examples": [
        {
          "english": "to be in one's element",
          "text": "être comme un poisson dans l’eau",
          "type": "example"
        }
      ],
      "glosses": [
        "like a duck takes to water, in one's element"
      ],
      "id": "en-comme_un_poisson_dans_l'eau-fr-prep_phrase-ZAH-4tDk",
      "links": [
        [
          "like a duck takes to water",
          "like a duck takes to water"
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        [
          "in one's element",
          "in one's element"
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      "raw_glosses": [
        "(simile) like a duck takes to water, in one's element"
      ],
      "related": [
        {
          "word": "heureux comme un poisson dans l’eau"
        }
      ],
      "synonyms": [
        {
          "word": "dans son élément"
        }
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  ],
  "sounds": [
    {
      "ipa": "/kɔ.m‿œ̃ pwa.sɔ̃ dɑ̃ l‿o/"
    }
  ],
  "word": "comme un poisson dans l'eau"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "like a fish in water"
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      "expansion": "“like a fish in water”",
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    {
      "args": {
        "1": "like a fish in water"
      },
      "expansion": "Literally, “like a fish in water”",
      "name": "lit"
    },
    {
      "args": {
        "1": "oc",
        "2": "coma un peis dins l'aiga"
      },
      "expansion": "Occitan coma un peis dins l'aiga",
      "name": "cog"
    }
  ],
  "etymology_text": "Literally, “like a fish in water”. Cognate with Occitan coma un peis dins l'aiga. Compare also the antonymous English idiom like a fish out of water.",
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    {
      "word": "heureux comme un poisson dans l’eau"
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      "examples": [
        {
          "english": "to be in one's element",
          "text": "être comme un poisson dans l’eau",
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      ],
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        "like a duck takes to water, in one's element"
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  "word": "comme un poisson dans l'eau"
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