"sist" meaning in Polabian

{
  "etymology_templates": [
    {
      "args": {
        "1": "pox",
        "2": "sla-pro",
        "3": "*šestь"
      },
      "expansion": "Proto-Slavic *šestь",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Slavic *šestь.",
  "head_templates": [
    {
      "args": {
        "1": "pox",
        "2": "numeral"
      },
      "expansion": "sist",
      "name": "head"
    }
  ],
  "lang": "Polabian",
  "lang_code": "pox",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 10 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Polabian cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Polabian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "_dis": "14 1 4 4 10 1 1 1 7 1 1 4 1 1 1 1 1 1 1 1 8 15 0 0 0 0 10 11 2 0",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "six (6)"
      ],
      "id": "en-sist-pox-num-pNZtnEPK",
      "links": [
        [
          "six",
          "six"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsist/"
    }
  ],
  "word": "sist"
}

{
  "categories": [
    "Pages with 10 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "pox",
        "2": "sla-pro",
        "3": "*šestь"
      },
      "expansion": "Proto-Slavic *šestь",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Slavic *šestь.",
  "head_templates": [
    {
      "args": {
        "1": "pox",
        "2": "numeral"
      },
      "expansion": "sist",
      "name": "head"
    }
  ],
  "lang": "Polabian",
  "lang_code": "pox",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Pages with 10 entries",
        "Pages with entries",
        "Polabian cardinal numbers",
        "Polabian entries with incorrect language header",
        "Polabian lemmas",
        "Polabian numerals",
        "Polabian terms derived from Proto-Slavic",
        "Polabian terms inherited from Proto-Slavic"
      ],
      "glosses": [
        "six (6)"
      ],
      "links": [
        [
          "six",
          "six"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsist/"
    }
  ],
  "word": "sist"
}