"chữ cứng" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "chữ",
        "3": "cứng",
        "t1": "character",
        "t2": "hard"
      },
      "expansion": "chữ (“character”) + cứng (“hard”)",
      "name": "com"
    },
    {
      "args": {
        "1": "vi",
        "2": "ja",
        "3": "片仮名",
        "nocap": "y",
        "tr": "katakana"
      },
      "expansion": "calque of Japanese 片仮名 (katakana)",
      "name": "cal"
    }
  ],
  "etymology_text": "chữ (“character”) + cứng (“hard”). Possibly a calque of Japanese 片仮名 (katakana), with reinterpretation of 片 (kata) as if it is from 固い (katai, “hard”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "chữ cứng",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "chữ cứng",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Writing systems",
          "orig": "vi:Writing systems",
          "parents": [
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "katakana"
      ],
      "id": "en-chữ_cứng-vi-noun-8ljcPso8",
      "links": [
        [
          "katakana",
          "katakana"
        ]
      ],
      "related": [
        {
          "word": "chữ mềm"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕɨ˦ˀ˥ kɨŋ˧˦]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[t͡ɕɨ˧˨ kɨŋ˦˧˥]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[cɨ˨˩˦ kɨŋ˦˥]",
      "note": "Saigon"
    }
  ],
  "word": "chữ cứng"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "chữ",
        "3": "cứng",
        "t1": "character",
        "t2": "hard"
      },
      "expansion": "chữ (“character”) + cứng (“hard”)",
      "name": "com"
    },
    {
      "args": {
        "1": "vi",
        "2": "ja",
        "3": "片仮名",
        "nocap": "y",
        "tr": "katakana"
      },
      "expansion": "calque of Japanese 片仮名 (katakana)",
      "name": "cal"
    }
  ],
  "etymology_text": "chữ (“character”) + cứng (“hard”). Possibly a calque of Japanese 片仮名 (katakana), with reinterpretation of 片 (kata) as if it is from 固い (katai, “hard”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "chữ cứng",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "chữ cứng",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "related": [
    {
      "word": "chữ mềm"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Vietnamese compound terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese terms calqued from Japanese",
        "Vietnamese terms derived from Japanese",
        "Vietnamese terms with IPA pronunciation",
        "vi:Writing systems"
      ],
      "glosses": [
        "katakana"
      ],
      "links": [
        [
          "katakana",
          "katakana"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕɨ˦ˀ˥ kɨŋ˧˦]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[t͡ɕɨ˧˨ kɨŋ˦˧˥]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[cɨ˨˩˦ kɨŋ˦˥]",
      "note": "Saigon"
    }
  ],
  "word": "chữ cứng"
}