"come mai" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "how 􂀿is it􂁀 ever 􂀿possible that􂁀... ?"
      },
      "expansion": "“how [is it] ever [possible that]... ?”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "how 􂀿is it􂁀 ever 􂀿possible that􂁀... ?"
      },
      "expansion": "Literally, “how [is it] ever [possible that]... ?”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “how [is it] ever [possible that]... ?”.",
  "head_templates": [
    {
      "args": {
        "head": "come mai?"
      },
      "expansion": "come mai?",
      "name": "it-adv"
    }
  ],
  "hyphenation": [
    "có‧me‧mài"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Why didn't you come to the party?",
          "text": "Come mai non sei venuto alla festa?",
          "type": "example"
        }
      ],
      "glosses": [
        "why, how come, why on Earth"
      ],
      "id": "en-come_mai-it-adv-TjnwxKZL",
      "links": [
        [
          "why",
          "why"
        ],
        [
          "how come",
          "how come"
        ],
        [
          "why on Earth",
          "why on Earth"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) why, how come, why on Earth"
      ],
      "synonyms": [
        {
          "word": "perché?"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌko.me‿mˈmaj/"
    },
    {
      "ipa": "/ˈko.me ˈmaj/"
    }
  ],
  "word": "come mai"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "how 􂀿is it􂁀 ever 􂀿possible that􂁀... ?"
      },
      "expansion": "“how [is it] ever [possible that]... ?”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "how 􂀿is it􂁀 ever 􂀿possible that􂁀... ?"
      },
      "expansion": "Literally, “how [is it] ever [possible that]... ?”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “how [is it] ever [possible that]... ?”.",
  "head_templates": [
    {
      "args": {
        "head": "come mai?"
      },
      "expansion": "come mai?",
      "name": "it-adv"
    }
  ],
  "hyphenation": [
    "có‧me‧mài"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Italian adverbs",
        "Italian entries with incorrect language header",
        "Italian idioms",
        "Italian lemmas",
        "Italian multiword terms",
        "Italian terms with IPA pronunciation",
        "Italian terms with usage examples"
      ],
      "examples": [
        {
          "english": "Why didn't you come to the party?",
          "text": "Come mai non sei venuto alla festa?",
          "type": "example"
        }
      ],
      "glosses": [
        "why, how come, why on Earth"
      ],
      "links": [
        [
          "why",
          "why"
        ],
        [
          "how come",
          "how come"
        ],
        [
          "why on Earth",
          "why on Earth"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) why, how come, why on Earth"
      ],
      "synonyms": [
        {
          "word": "perché?"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌko.me‿mˈmaj/"
    },
    {
      "ipa": "/ˈko.me ˈmaj/"
    }
  ],
  "word": "come mai"
}