"mine de rien" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "appearance of nothing"
      },
      "expansion": "“appearance of nothing”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "it looked like nothing"
      },
      "expansion": "“it looked like nothing”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "appearance of nothing",
        "2": "it looked like nothing"
      },
      "expansion": "Literally, “appearance of nothing”, or more loosely translated as “it looked like nothing”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “appearance of nothing”, or more loosely translated as “it looked like nothing”.",
  "head_templates": [
    {
      "args": {},
      "expansion": "mine de rien",
      "name": "fr-adv"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adv",
  "related": [
    {
      "_dis1": "0 0",
      "word": "faire mine"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "57 43",
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "discreetly, nonchalantly, unsuspiciously, innocently, sneakily"
      ],
      "id": "en-mine_de_rien-fr-adv-57jIXz8~",
      "links": [
        [
          "discreetly",
          "discreetly"
        ],
        [
          "nonchalantly",
          "nonchalantly"
        ],
        [
          "unsuspiciously",
          "unsuspiciously"
        ],
        [
          "innocently",
          "innocently"
        ],
        [
          "sneakily",
          "sneakily"
        ]
      ],
      "raw_glosses": [
        "(informal) discreetly, nonchalantly, unsuspiciously, innocently, sneakily"
      ],
      "tags": [
        "informal"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "Je pensais que ça serait vite fini, mais mine de rien, ça fait déjà quatre heures qu’on travaille.",
          "type": "example"
        },
        {
          "text": "Mine de rien, il a réussi avec grande distinction.",
          "type": "example"
        }
      ],
      "glosses": [
        "without realising it; you wouldn't think so, but"
      ],
      "id": "en-mine_de_rien-fr-adv-AV4yBsWA",
      "links": [
        [
          "realising",
          "realising"
        ]
      ],
      "raw_glosses": [
        "(informal) without realising it; you wouldn't think so, but"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/min də ʁjɛ̃/"
    }
  ],
  "word": "mine de rien"
}

{
  "categories": [
    "French adverbs",
    "French entries with incorrect language header",
    "French lemmas",
    "French multiword terms",
    "French terms with IPA pronunciation"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "appearance of nothing"
      },
      "expansion": "“appearance of nothing”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "it looked like nothing"
      },
      "expansion": "“it looked like nothing”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "appearance of nothing",
        "2": "it looked like nothing"
      },
      "expansion": "Literally, “appearance of nothing”, or more loosely translated as “it looked like nothing”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “appearance of nothing”, or more loosely translated as “it looked like nothing”.",
  "head_templates": [
    {
      "args": {},
      "expansion": "mine de rien",
      "name": "fr-adv"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adv",
  "related": [
    {
      "word": "faire mine"
    }
  ],
  "senses": [
    {
      "categories": [
        "French informal terms"
      ],
      "glosses": [
        "discreetly, nonchalantly, unsuspiciously, innocently, sneakily"
      ],
      "links": [
        [
          "discreetly",
          "discreetly"
        ],
        [
          "nonchalantly",
          "nonchalantly"
        ],
        [
          "unsuspiciously",
          "unsuspiciously"
        ],
        [
          "innocently",
          "innocently"
        ],
        [
          "sneakily",
          "sneakily"
        ]
      ],
      "raw_glosses": [
        "(informal) discreetly, nonchalantly, unsuspiciously, innocently, sneakily"
      ],
      "tags": [
        "informal"
      ]
    },
    {
      "categories": [
        "French informal terms",
        "French terms with usage examples",
        "Requests for translations of French usage examples"
      ],
      "examples": [
        {
          "text": "Je pensais que ça serait vite fini, mais mine de rien, ça fait déjà quatre heures qu’on travaille.",
          "type": "example"
        },
        {
          "text": "Mine de rien, il a réussi avec grande distinction.",
          "type": "example"
        }
      ],
      "glosses": [
        "without realising it; you wouldn't think so, but"
      ],
      "links": [
        [
          "realising",
          "realising"
        ]
      ],
      "raw_glosses": [
        "(informal) without realising it; you wouldn't think so, but"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/min də ʁjɛ̃/"
    }
  ],
  "word": "mine de rien"
}