"must" meaning in Estisch

{
  "categories": [
    {
      "kind": "other",
      "name": "Woorden in het Estisch",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Zelfstandig naamwoord in het Estisch",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "must auk"
    }
  ],
  "lang": "Estisch",
  "lang_code": "et",
  "pos": "noun",
  "pos_title": "Zelfstandig naamwoord",
  "senses": [
    {
      "glosses": [
        "zwart"
      ],
      "id": "nl-must-et-noun-G7cReufq"
    }
  ],
  "word": "must"
}

{
  "categories": [
    "Woorden in het Estisch",
    "Zelfstandig naamwoord in het Estisch"
  ],
  "derived": [
    {
      "word": "must auk"
    }
  ],
  "lang": "Estisch",
  "lang_code": "et",
  "pos": "noun",
  "pos_title": "Zelfstandig naamwoord",
  "senses": [
    {
      "glosses": [
        "zwart"
      ]
    }
  ],
  "word": "must"
}