"тѧжькъ" meaning in Vieux slave

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en vieux slave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en vieux slave issus d’un mot en proto-slave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vieux slave",
      "orig": "vieux slave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Étymologies en vieux slave incluant une reconstruction",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "тѧгость"
    },
    {
      "word": "тѧжєсть"
    },
    {
      "lang": "Biélorusse",
      "lang_code": "be",
      "word": "цяжкі"
    },
    {
      "lang": "Polonais",
      "lang_code": "pl",
      "word": "ciężki"
    },
    {
      "lang": "Russe",
      "lang_code": "ru",
      "word": "тяжёлый"
    },
    {
      "lang": "Serbo-croate",
      "lang_code": "sh",
      "word": "težak"
    },
    {
      "lang": "Serbo-croate",
      "lang_code": "sh",
      "word": "тежак"
    },
    {
      "lang": "Slovaque",
      "lang_code": "sk",
      "word": "ťažký"
    },
    {
      "lang": "Tchèque",
      "lang_code": "cs",
      "word": "těžký"
    }
  ],
  "etymology_texts": [
    "Du proto-slave *tęžьkъ."
  ],
  "lang": "Vieux slave",
  "lang_code": "cu",
  "pos": "adj",
  "pos_title": "Adjectif",
  "related": [
    {
      "raw_tags": [
        "Glagolitique"
      ],
      "word": "ⱅⱔⰶⱐⰽⱏ"
    },
    {
      "raw_tags": [
        "Cyrillique tardif"
      ],
      "word": "тѧжъкъ"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Lourd."
      ],
      "id": "fr-тѧжькъ-cu-adj-Pb4ZXSJQ"
    }
  ],
  "tags": [
    "comparative"
  ],
  "word": "тѧжькъ"
}

{
  "categories": [
    "Adjectifs en vieux slave",
    "Mots en vieux slave issus d’un mot en proto-slave",
    "vieux slave",
    "Étymologies en vieux slave incluant une reconstruction"
  ],
  "derived": [
    {
      "word": "тѧгость"
    },
    {
      "word": "тѧжєсть"
    },
    {
      "lang": "Biélorusse",
      "lang_code": "be",
      "word": "цяжкі"
    },
    {
      "lang": "Polonais",
      "lang_code": "pl",
      "word": "ciężki"
    },
    {
      "lang": "Russe",
      "lang_code": "ru",
      "word": "тяжёлый"
    },
    {
      "lang": "Serbo-croate",
      "lang_code": "sh",
      "word": "težak"
    },
    {
      "lang": "Serbo-croate",
      "lang_code": "sh",
      "word": "тежак"
    },
    {
      "lang": "Slovaque",
      "lang_code": "sk",
      "word": "ťažký"
    },
    {
      "lang": "Tchèque",
      "lang_code": "cs",
      "word": "těžký"
    }
  ],
  "etymology_texts": [
    "Du proto-slave *tęžьkъ."
  ],
  "lang": "Vieux slave",
  "lang_code": "cu",
  "pos": "adj",
  "pos_title": "Adjectif",
  "related": [
    {
      "raw_tags": [
        "Glagolitique"
      ],
      "word": "ⱅⱔⰶⱐⰽⱏ"
    },
    {
      "raw_tags": [
        "Cyrillique tardif"
      ],
      "word": "тѧжъкъ"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Lourd."
      ]
    }
  ],
  "tags": [
    "comparative"
  ],
  "word": "тѧжькъ"
}