"mustest" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "mostest",
        "nocat": "1"
      },
      "expansion": "Middle English mostest",
      "name": "inh"
    },
    {
      "args": {
        "1": "enm",
        "2": "mustest"
      },
      "expansion": "mustest",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "ang",
        "3": "mōstest",
        "nocat": "1"
      },
      "expansion": "Old English mōstest",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "must",
        "3": "est",
        "nocat": "1"
      },
      "expansion": "must + -est",
      "name": "suffix"
    }
  ],
  "etymology_text": "From Middle English mostest, mustest, from Old English mōstest; equivalent to must + -est.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "mustest",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "must"
        }
      ],
      "glosses": [
        "second-person singular simple past indicative of must"
      ],
      "id": "en-mustest-en-verb-j5htRb9i",
      "links": [
        [
          "must",
          "must#English"
        ]
      ],
      "raw_glosses": [
        "(archaic) second-person singular simple past indicative of must"
      ],
      "tags": [
        "archaic",
        "form-of",
        "indicative",
        "past",
        "second-person",
        "singular"
      ]
    }
  ],
  "word": "mustest"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "mostest",
        "nocat": "1"
      },
      "expansion": "Middle English mostest",
      "name": "inh"
    },
    {
      "args": {
        "1": "enm",
        "2": "mustest"
      },
      "expansion": "mustest",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "ang",
        "3": "mōstest",
        "nocat": "1"
      },
      "expansion": "Old English mōstest",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "must",
        "3": "est",
        "nocat": "1"
      },
      "expansion": "must + -est",
      "name": "suffix"
    }
  ],
  "etymology_text": "From Middle English mostest, mustest, from Old English mōstest; equivalent to must + -est.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "mustest",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English second-person singular past tense forms",
        "English verb forms"
      ],
      "form_of": [
        {
          "word": "must"
        }
      ],
      "glosses": [
        "second-person singular simple past indicative of must"
      ],
      "links": [
        [
          "must",
          "must#English"
        ]
      ],
      "raw_glosses": [
        "(archaic) second-person singular simple past indicative of must"
      ],
      "tags": [
        "archaic",
        "form-of",
        "indicative",
        "past",
        "second-person",
        "singular"
      ]
    }
  ],
  "word": "mustest"
}