"skalać" meaning in Old Polish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pl",
            "2": "skalać"
          },
          "expansion": "Polish: skalać",
          "name": "desc"
        }
      ],
      "text": "Polish: skalać"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "zlw-opl",
        "2": "s-",
        "3": "kalać"
      },
      "expansion": "s- + kalać",
      "name": "af"
    },
    {
      "args": {
        "1": "14th century"
      },
      "expansion": "the 14th century",
      "name": "etydate/the"
    },
    {
      "args": {
        "1": "14th century"
      },
      "expansion": "First attested in the 14th century.",
      "name": "etydate"
    }
  ],
  "etymology_text": "From s- + kalać. First attested in the 14th century.",
  "forms": [
    {
      "form": "kalać",
      "tags": [
        "imperfective"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "pf",
        "impf": "kalać"
      },
      "expansion": "skalać pf (imperfective kalać)",
      "name": "zlw-opl-verb"
    }
  ],
  "lang": "Old Polish",
  "lang_code": "zlw-opl",
  "pos": "verb",
  "related": [
    {
      "_dis1": "0 0",
      "word": "kał"
    }
  ],
  "senses": [
    {
      "glosses": [
        "to befoul, to stain (to make foul; to soil; to contaminate, pollute)"
      ],
      "id": "en-skalać-zlw-opl-verb-WszxsEQz",
      "links": [
        [
          "befoul",
          "befoul"
        ],
        [
          "stain",
          "stain"
        ]
      ],
      "tags": [
        "perfective"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lesser Poland Old Polish",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "31 69",
          "kind": "other",
          "name": "Old Polish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "27 73",
          "kind": "other",
          "name": "Old Polish terms prefixed with s-",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "to befoul, to stain (to stain or mar i.e. with words)"
      ],
      "id": "en-skalać-zlw-opl-verb-R7PpzOfq",
      "links": [
        [
          "befoul",
          "befoul"
        ],
        [
          "stain",
          "stain"
        ]
      ],
      "qualifier": "attested in Lesser Poland",
      "raw_glosses": [
        "(figurative, attested in Lesser Poland) to befoul, to stain (to stain or mar i.e. with words)"
      ],
      "tags": [
        "figuratively",
        "perfective"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/skalʲat͡ɕ/",
      "note": "10ᵗʰ–15ᵗʰ CE"
    },
    {
      "ipa": "/skalʲat͡ɕ/",
      "note": "15ᵗʰ CE"
    }
  ],
  "word": "skalać"
}

{
  "categories": [
    "Old Polish entries with incorrect language header",
    "Old Polish lemmas",
    "Old Polish perfective verbs",
    "Old Polish terms prefixed with s-",
    "Old Polish terms with IPA pronunciation",
    "Old Polish verbs"
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pl",
            "2": "skalać"
          },
          "expansion": "Polish: skalać",
          "name": "desc"
        }
      ],
      "text": "Polish: skalać"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "zlw-opl",
        "2": "s-",
        "3": "kalać"
      },
      "expansion": "s- + kalać",
      "name": "af"
    },
    {
      "args": {
        "1": "14th century"
      },
      "expansion": "the 14th century",
      "name": "etydate/the"
    },
    {
      "args": {
        "1": "14th century"
      },
      "expansion": "First attested in the 14th century.",
      "name": "etydate"
    }
  ],
  "etymology_text": "From s- + kalać. First attested in the 14th century.",
  "forms": [
    {
      "form": "kalać",
      "tags": [
        "imperfective"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "pf",
        "impf": "kalać"
      },
      "expansion": "skalać pf (imperfective kalać)",
      "name": "zlw-opl-verb"
    }
  ],
  "lang": "Old Polish",
  "lang_code": "zlw-opl",
  "pos": "verb",
  "related": [
    {
      "word": "kał"
    }
  ],
  "senses": [
    {
      "glosses": [
        "to befoul, to stain (to make foul; to soil; to contaminate, pollute)"
      ],
      "links": [
        [
          "befoul",
          "befoul"
        ],
        [
          "stain",
          "stain"
        ]
      ],
      "tags": [
        "perfective"
      ]
    },
    {
      "categories": [
        "Lesser Poland Old Polish"
      ],
      "glosses": [
        "to befoul, to stain (to stain or mar i.e. with words)"
      ],
      "links": [
        [
          "befoul",
          "befoul"
        ],
        [
          "stain",
          "stain"
        ]
      ],
      "qualifier": "attested in Lesser Poland",
      "raw_glosses": [
        "(figurative, attested in Lesser Poland) to befoul, to stain (to stain or mar i.e. with words)"
      ],
      "tags": [
        "figuratively",
        "perfective"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/skalʲat͡ɕ/",
      "note": "10ᵗʰ–15ᵗʰ CE"
    },
    {
      "ipa": "/skalʲat͡ɕ/",
      "note": "15ᵗʰ CE"
    }
  ],
  "word": "skalać"
}