"chasteau" meaning in Middle French

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fr",
            "2": "château"
          },
          "expansion": "French: château\n→ Danish: chateau\n→ English: château, chateau\n→ Russian: шато́ (šató)\n→ Turkish: şato\n→ Ukrainian: шато́ (šató)",
          "name": "desctree"
        }
      ],
      "text": "French: château\n→ Danish: chateau\n→ English: château, chateau\n→ Russian: шато́ (šató)\n→ Turkish: şato\n→ Ukrainian: шато́ (šató)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": "fro",
        "3": "chastel"
      },
      "expansion": "Old French chastel",
      "name": "inh"
    },
    {
      "args": {
        "1": "frm",
        "2": "la",
        "3": "castellum"
      },
      "expansion": "Latin castellum",
      "name": "inh"
    }
  ],
  "etymology_text": "From Old French chastel, from Latin castellum, from castrum.",
  "forms": [
    {
      "form": "chasteaulx",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "10": "{{{f}}}",
        "11": "",
        "12": "{{{f}}}s",
        "2": "noun",
        "3": "",
        "4": "",
        "5": "plural",
        "6": "chasteaulx",
        "7": "",
        "8": "{{{pl2}}}",
        "9": "",
        "f1accel-form": "p",
        "g": "m",
        "g2": "",
        "head": "",
        "sort": ""
      },
      "expansion": "chasteau m (plural chasteaulx)",
      "name": "head"
    },
    {
      "args": {
        "1": "m",
        "2": "chasteaulx"
      },
      "expansion": "chasteau m (plural chasteaulx)",
      "name": "frm-noun"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "castle (large fortified building)"
      ],
      "id": "en-chasteau-frm-noun-ANhCNaG3",
      "links": [
        [
          "castle",
          "castle"
        ]
      ],
      "synonyms": [
        {
          "word": "chastel"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "chasteau"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fr",
            "2": "château"
          },
          "expansion": "French: château\n→ Danish: chateau\n→ English: château, chateau\n→ Russian: шато́ (šató)\n→ Turkish: şato\n→ Ukrainian: шато́ (šató)",
          "name": "desctree"
        }
      ],
      "text": "French: château\n→ Danish: chateau\n→ English: château, chateau\n→ Russian: шато́ (šató)\n→ Turkish: şato\n→ Ukrainian: шато́ (šató)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": "fro",
        "3": "chastel"
      },
      "expansion": "Old French chastel",
      "name": "inh"
    },
    {
      "args": {
        "1": "frm",
        "2": "la",
        "3": "castellum"
      },
      "expansion": "Latin castellum",
      "name": "inh"
    }
  ],
  "etymology_text": "From Old French chastel, from Latin castellum, from castrum.",
  "forms": [
    {
      "form": "chasteaulx",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "10": "{{{f}}}",
        "11": "",
        "12": "{{{f}}}s",
        "2": "noun",
        "3": "",
        "4": "",
        "5": "plural",
        "6": "chasteaulx",
        "7": "",
        "8": "{{{pl2}}}",
        "9": "",
        "f1accel-form": "p",
        "g": "m",
        "g2": "",
        "head": "",
        "sort": ""
      },
      "expansion": "chasteau m (plural chasteaulx)",
      "name": "head"
    },
    {
      "args": {
        "1": "m",
        "2": "chasteaulx"
      },
      "expansion": "chasteau m (plural chasteaulx)",
      "name": "frm-noun"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Middle French countable nouns",
        "Middle French entries with incorrect language header",
        "Middle French lemmas",
        "Middle French masculine nouns",
        "Middle French nouns",
        "Middle French terms derived from Latin",
        "Middle French terms derived from Old French",
        "Middle French terms inherited from Latin",
        "Middle French terms inherited from Old French"
      ],
      "glosses": [
        "castle (large fortified building)"
      ],
      "links": [
        [
          "castle",
          "castle"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "chastel"
    }
  ],
  "word": "chasteau"
}