"musta" meaning in English

{
  "etymology_text": "Written form of a reduction of must have.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "contraction",
        "head": ""
      },
      "expansion": "musta",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "musta",
      "name": "en-cont"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "must have"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English non-constituents",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 11 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He musta guessed. There's no other explanation.",
          "type": "example"
        },
        {
          "ref": "2006, Noire [pseudonym], Thug-A-Licious: An Urban Erotic Tale, New York, N.Y.: One World, Ballantine Books, →ISBN, page 38:",
          "text": "I ran out the kitchen and down the narrow hallway. I passed a staircase on my right that led to the apartment upstairs where T.C. and Miss Lady lived. I'd never been invited up there but I had a colorful picture in my little head about how grand it musta been.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Contraction of must have."
      ],
      "id": "en-musta-en-verb-gZWkvNmr",
      "links": [
        [
          "must",
          "must#English"
        ],
        [
          "have",
          "have#English"
        ]
      ],
      "raw_glosses": [
        "(colloquial) Contraction of must have."
      ],
      "related": [
        {
          "word": "coulda"
        },
        {
          "word": "hadda"
        },
        {
          "word": "shoulda"
        },
        {
          "word": "woulda"
        },
        {
          "word": "mighta"
        },
        {
          "word": "oughta"
        }
      ],
      "synonyms": [
        {
          "word": "must’ve"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "colloquial",
        "contraction"
      ],
      "wikipedia": [
        "reduction (linguistics)"
      ]
    }
  ],
  "word": "musta"
}

{
  "etymology_text": "Written form of a reduction of must have.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "contraction",
        "head": ""
      },
      "expansion": "musta",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "musta",
      "name": "en-cont"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "coulda"
    },
    {
      "word": "hadda"
    },
    {
      "word": "shoulda"
    },
    {
      "word": "woulda"
    },
    {
      "word": "mighta"
    },
    {
      "word": "oughta"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "must have"
        }
      ],
      "categories": [
        "English colloquialisms",
        "English contractions",
        "English entries with incorrect language header",
        "English non-constituents",
        "English non-lemma forms",
        "English terms with quotations",
        "English terms with usage examples",
        "Pages with 11 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "He musta guessed. There's no other explanation.",
          "type": "example"
        },
        {
          "ref": "2006, Noire [pseudonym], Thug-A-Licious: An Urban Erotic Tale, New York, N.Y.: One World, Ballantine Books, →ISBN, page 38:",
          "text": "I ran out the kitchen and down the narrow hallway. I passed a staircase on my right that led to the apartment upstairs where T.C. and Miss Lady lived. I'd never been invited up there but I had a colorful picture in my little head about how grand it musta been.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Contraction of must have."
      ],
      "links": [
        [
          "must",
          "must#English"
        ],
        [
          "have",
          "have#English"
        ]
      ],
      "raw_glosses": [
        "(colloquial) Contraction of must have."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "colloquial",
        "contraction"
      ],
      "wikipedia": [
        "reduction (linguistics)"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "must’ve"
    }
  ],
  "word": "musta"
}