"plutwa" meaning in Old Polish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pl",
            "2": "płetwa",
            "unc": "1"
          },
          "expansion": ">? Polish: płetwa",
          "name": "desc"
        }
      ],
      "text": ">? Polish: płetwa"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "zlw-opl",
        "2": "sla-pro"
      },
      "expansion": "",
      "name": "dercat"
    },
    {
      "args": {
        "1": "loanword",
        "2": "Borrowed"
      },
      "expansion": "Borrowed",
      "name": "glossary"
    },
    {
      "args": {
        "1": "zlw-opl",
        "2": "zlw-ocs",
        "3": "plútva",
        "4": "",
        "5": "",
        "g": "",
        "g2": "",
        "g3": "",
        "id": "",
        "lit": "",
        "nocat": "",
        "pos": "",
        "sc": "",
        "sort": "",
        "tr": "",
        "ts": ""
      },
      "expansion": "Old Czech plútva",
      "name": "bor"
    },
    {
      "args": {
        "1": "zlw-opl",
        "2": "zlw-ocs",
        "3": "plútva"
      },
      "expansion": "Borrowed from Old Czech plútva",
      "name": "bor+"
    },
    {
      "args": {
        "1": "bg",
        "2": "плу́тва"
      },
      "expansion": "Bulgarian плу́тва (plútva)",
      "name": "cog"
    },
    {
      "args": {
        "1": "cs",
        "2": "ploutev"
      },
      "expansion": "Czech ploutev",
      "name": "cog"
    },
    {
      "args": {
        "1": "sk",
        "2": "plutva"
      },
      "expansion": "Slovak plutva",
      "name": "cog"
    }
  ],
  "etymology_text": "Borrowed from Old Czech plútva. Compare Bulgarian плу́тва (plútva), Czech ploutev, Slovak plutva.",
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "plutwa f",
      "name": "zlw-opl-noun"
    }
  ],
  "lang": "Old Polish",
  "lang_code": "zlw-opl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Polish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "fin (appendage of a fish)"
      ],
      "id": "en-plutwa-zlw-opl-noun-45ZHv2Hp",
      "links": [
        [
          "fin",
          "fin"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/plʲutfa/",
      "note": "10ᵗʰ–15ᵗʰ CE"
    },
    {
      "ipa": "/plʲutfa/",
      "note": "15ᵗʰ CE"
    }
  ],
  "word": "plutwa"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pl",
            "2": "płetwa",
            "unc": "1"
          },
          "expansion": ">? Polish: płetwa",
          "name": "desc"
        }
      ],
      "text": ">? Polish: płetwa"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "zlw-opl",
        "2": "sla-pro"
      },
      "expansion": "",
      "name": "dercat"
    },
    {
      "args": {
        "1": "loanword",
        "2": "Borrowed"
      },
      "expansion": "Borrowed",
      "name": "glossary"
    },
    {
      "args": {
        "1": "zlw-opl",
        "2": "zlw-ocs",
        "3": "plútva",
        "4": "",
        "5": "",
        "g": "",
        "g2": "",
        "g3": "",
        "id": "",
        "lit": "",
        "nocat": "",
        "pos": "",
        "sc": "",
        "sort": "",
        "tr": "",
        "ts": ""
      },
      "expansion": "Old Czech plútva",
      "name": "bor"
    },
    {
      "args": {
        "1": "zlw-opl",
        "2": "zlw-ocs",
        "3": "plútva"
      },
      "expansion": "Borrowed from Old Czech plútva",
      "name": "bor+"
    },
    {
      "args": {
        "1": "bg",
        "2": "плу́тва"
      },
      "expansion": "Bulgarian плу́тва (plútva)",
      "name": "cog"
    },
    {
      "args": {
        "1": "cs",
        "2": "ploutev"
      },
      "expansion": "Czech ploutev",
      "name": "cog"
    },
    {
      "args": {
        "1": "sk",
        "2": "plutva"
      },
      "expansion": "Slovak plutva",
      "name": "cog"
    }
  ],
  "etymology_text": "Borrowed from Old Czech plútva. Compare Bulgarian плу́тва (plútva), Czech ploutev, Slovak plutva.",
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "plutwa f",
      "name": "zlw-opl-noun"
    }
  ],
  "lang": "Old Polish",
  "lang_code": "zlw-opl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Old Polish entries with incorrect language header",
        "Old Polish feminine nouns",
        "Old Polish lemmas",
        "Old Polish nouns",
        "Old Polish terms borrowed from Old Czech",
        "Old Polish terms derived from Old Czech",
        "Old Polish terms derived from Proto-Slavic",
        "Old Polish terms with IPA pronunciation",
        "zlw-opl:Animal body parts"
      ],
      "glosses": [
        "fin (appendage of a fish)"
      ],
      "links": [
        [
          "fin",
          "fin"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/plʲutfa/",
      "note": "10ᵗʰ–15ᵗʰ CE"
    },
    {
      "ipa": "/plʲutfa/",
      "note": "15ᵗʰ CE"
    }
  ],
  "word": "plutwa"
}