"назубок" meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "на зубо́к"
      },
      "expansion": "Univerbation of на зубо́к (na zubók)",
      "name": "univerbation"
    }
  ],
  "etymology_text": "Univerbation of на зубо́к (na zubók).",
  "forms": [
    {
      "form": "назубо́к",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nazubók",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "назубо́к"
      },
      "expansion": "назубо́к • (nazubók)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian univerbations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "to know inside and out, to know backwards",
          "roman": "znatʹ nazubók",
          "text": "знать назубо́к",
          "type": "example"
        }
      ],
      "glosses": [
        "inside out, off pat, thoroughly"
      ],
      "id": "en-назубок-ru-adv-0JYPw1QV",
      "links": [
        [
          "inside out",
          "inside out"
        ],
        [
          "off pat",
          "off pat"
        ],
        [
          "thoroughly",
          "thoroughly"
        ]
      ],
      "raw_glosses": [
        "(informal) inside out, off pat, thoroughly"
      ],
      "related": [
        {
          "roman": "naizústʹ",
          "word": "наизу́сть"
        }
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nəzʊˈbok]"
    }
  ],
  "word": "назубок"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "на зубо́к"
      },
      "expansion": "Univerbation of на зубо́к (na zubók)",
      "name": "univerbation"
    }
  ],
  "etymology_text": "Univerbation of на зубо́к (na zubók).",
  "forms": [
    {
      "form": "назубо́к",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nazubók",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "назубо́к"
      },
      "expansion": "назубо́к • (nazubók)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "roman": "naizústʹ",
      "word": "наизу́сть"
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian 3-syllable words",
        "Russian adverbs",
        "Russian entries with incorrect language header",
        "Russian informal terms",
        "Russian lemmas",
        "Russian terms with IPA pronunciation",
        "Russian terms with usage examples",
        "Russian univerbations"
      ],
      "examples": [
        {
          "english": "to know inside and out, to know backwards",
          "roman": "znatʹ nazubók",
          "text": "знать назубо́к",
          "type": "example"
        }
      ],
      "glosses": [
        "inside out, off pat, thoroughly"
      ],
      "links": [
        [
          "inside out",
          "inside out"
        ],
        [
          "off pat",
          "off pat"
        ],
        [
          "thoroughly",
          "thoroughly"
        ]
      ],
      "raw_glosses": [
        "(informal) inside out, off pat, thoroughly"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nəzʊˈbok]"
    }
  ],
  "word": "назубок"
}