"go into one's shell" meaning in English

{
  "etymology_text": "From turtles, who go into their shells to protect themselves.",
  "forms": [
    {
      "form": "goes into one's shell",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "going into one's shell",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "went into one's shell",
      "tags": [
        "past"
      ]
    },
    {
      "form": "gone into one's shell",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "go<goes,,went,gone> into one's shell"
      },
      "expansion": "go into one's shell (third-person singular simple present goes into one's shell, present participle going into one's shell, simple past went into one's shell, past participle gone into one's shell)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2011 December 7, David Ornstein, “FC Basel 2 - 1 Man Utd”, in BBC Sport:",
          "text": "Instead of gathering the ball, De Gea poked it away with his foot and Streller was able to place a powerful half-volley into the net.\nUnited went into their shells and it was not until the 29th minute that they mustered a response - one from which they should have equalised.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To act defensively."
      ],
      "id": "en-go_into_one's_shell-en-verb-vrMeRiat",
      "links": [
        [
          "defensively",
          "defensively"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To act defensively."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-go into one's shell.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/04/En-au-go_into_one%27s_shell.ogg/En-au-go_into_one%27s_shell.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/0/04/En-au-go_into_one%27s_shell.ogg"
    }
  ],
  "word": "go into one's shell"
}

{
  "etymology_text": "From turtles, who go into their shells to protect themselves.",
  "forms": [
    {
      "form": "goes into one's shell",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "going into one's shell",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "went into one's shell",
      "tags": [
        "past"
      ]
    },
    {
      "form": "gone into one's shell",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "go<goes,,went,gone> into one's shell"
      },
      "expansion": "go into one's shell (third-person singular simple present goes into one's shell, present participle going into one's shell, simple past went into one's shell, past participle gone into one's shell)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2011 December 7, David Ornstein, “FC Basel 2 - 1 Man Utd”, in BBC Sport:",
          "text": "Instead of gathering the ball, De Gea poked it away with his foot and Streller was able to place a powerful half-volley into the net.\nUnited went into their shells and it was not until the 29th minute that they mustered a response - one from which they should have equalised.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To act defensively."
      ],
      "links": [
        [
          "defensively",
          "defensively"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To act defensively."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-go into one's shell.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/04/En-au-go_into_one%27s_shell.ogg/En-au-go_into_one%27s_shell.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/0/04/En-au-go_into_one%27s_shell.ogg"
    }
  ],
  "word": "go into one's shell"
}