"musić" meaning in Polish

{
  "head_templates": [
    {
      "args": {
        "1": "impf"
      },
      "expansion": "musić impf",
      "name": "pl-verb"
    }
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "musieć"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Middle Polish",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Polish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Middle Polish form of musieć"
      ],
      "id": "en-musić-pl-verb-RqPRxWXg",
      "links": [
        [
          "musieć",
          "musieć#Polish"
        ]
      ],
      "raw_glosses": [
        "(intransitive) Middle Polish form of musieć"
      ],
      "tags": [
        "Middle",
        "Polish",
        "alt-of",
        "imperfective",
        "intransitive"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmu.ɕit͡ɕ/",
      "tags": [
        "Middle",
        "Polish"
      ]
    }
  ],
  "word": "musić"
}

{
  "head_templates": [
    {
      "args": {
        "1": "impf"
      },
      "expansion": "musić impf",
      "name": "pl-verb"
    }
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "musieć"
        }
      ],
      "categories": [
        "Middle Polish",
        "Pages with 2 entries",
        "Polish 2-syllable words",
        "Polish entries with incorrect language header",
        "Polish imperfective verbs",
        "Polish intransitive verbs",
        "Polish lemmas",
        "Polish terms with IPA pronunciation",
        "Polish verbs"
      ],
      "glosses": [
        "Middle Polish form of musieć"
      ],
      "links": [
        [
          "musieć",
          "musieć#Polish"
        ]
      ],
      "raw_glosses": [
        "(intransitive) Middle Polish form of musieć"
      ],
      "tags": [
        "Middle",
        "Polish",
        "alt-of",
        "imperfective",
        "intransitive"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmu.ɕit͡ɕ/",
      "tags": [
        "Middle",
        "Polish"
      ]
    }
  ],
  "word": "musić"
}