"sis" meaning in Old French

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "frm",
            "2": "six"
          },
          "expansion": "Middle French: six\nFrench: six\nHaitian Creole: sis\nLouisiana Creole: sis\nMauritian Creole: sis\nNorman: six",
          "name": "desctree"
        }
      ],
      "text": "Middle French: six\nFrench: six\nHaitian Creole: sis\nLouisiana Creole: sis\nMauritian Creole: sis\nNorman: six"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "wa",
            "2": "shijh"
          },
          "expansion": "Walloon: shijh",
          "name": "desc"
        }
      ],
      "text": "Walloon: shijh"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "enm",
            "2": "sice",
            "3": "sis",
            "bor": "1"
          },
          "expansion": "→ Middle English: sice, sis",
          "name": "desc"
        }
      ],
      "text": "→ Middle English: sice, sis"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "sice"
          },
          "expansion": "English: sice, sise, size\n→ Japanese: サイス (saisu)",
          "name": "desctree"
        }
      ],
      "text": "English: sice, sise, size\n→ Japanese: サイス (saisu)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fro",
        "2": "la",
        "3": "sex"
      },
      "expansion": "Latin sex",
      "name": "inh"
    },
    {
      "args": {
        "1": "fro",
        "2": "ine-pro",
        "3": "*swéḱs"
      },
      "expansion": "Proto-Indo-European *swéḱs",
      "name": "inh"
    }
  ],
  "etymology_text": "From Latin sex, from Proto-Indo-European *swéḱs.",
  "head_templates": [
    {
      "args": {
        "1": "fro",
        "2": "numeral"
      },
      "expansion": "sis",
      "name": "head"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Old French cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 23 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "six"
      ],
      "id": "en-sis-fro-num-RHeNgjZe",
      "links": [
        [
          "six",
          "six"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sis/"
    }
  ],
  "word": "sis"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "frm",
            "2": "six"
          },
          "expansion": "Middle French: six\nFrench: six\nHaitian Creole: sis\nLouisiana Creole: sis\nMauritian Creole: sis\nNorman: six",
          "name": "desctree"
        }
      ],
      "text": "Middle French: six\nFrench: six\nHaitian Creole: sis\nLouisiana Creole: sis\nMauritian Creole: sis\nNorman: six"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "wa",
            "2": "shijh"
          },
          "expansion": "Walloon: shijh",
          "name": "desc"
        }
      ],
      "text": "Walloon: shijh"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "enm",
            "2": "sice",
            "3": "sis",
            "bor": "1"
          },
          "expansion": "→ Middle English: sice, sis",
          "name": "desc"
        }
      ],
      "text": "→ Middle English: sice, sis"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "sice"
          },
          "expansion": "English: sice, sise, size\n→ Japanese: サイス (saisu)",
          "name": "desctree"
        }
      ],
      "text": "English: sice, sise, size\n→ Japanese: サイス (saisu)"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fro",
        "2": "la",
        "3": "sex"
      },
      "expansion": "Latin sex",
      "name": "inh"
    },
    {
      "args": {
        "1": "fro",
        "2": "ine-pro",
        "3": "*swéḱs"
      },
      "expansion": "Proto-Indo-European *swéḱs",
      "name": "inh"
    }
  ],
  "etymology_text": "From Latin sex, from Proto-Indo-European *swéḱs.",
  "head_templates": [
    {
      "args": {
        "1": "fro",
        "2": "numeral"
      },
      "expansion": "sis",
      "name": "head"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Old French cardinal numbers",
        "Old French entries with incorrect language header",
        "Old French lemmas",
        "Old French numerals",
        "Old French palindromes",
        "Old French terms derived from Latin",
        "Old French terms derived from Proto-Indo-European",
        "Old French terms inherited from Latin",
        "Old French terms inherited from Proto-Indo-European",
        "Pages with 23 entries",
        "Pages with entries"
      ],
      "glosses": [
        "six"
      ],
      "links": [
        [
          "six",
          "six"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sis/"
    }
  ],
  "word": "sis"
}