"байгуулсан" meaning in Mongolian

{
  "forms": [
    {
      "form": "bajguulsan",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "байгуулсан • (bajguulsan)",
      "name": "mn-verb-form"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Mongolian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mongolian terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "past participle in -сан (-san) of байгуулах (bajguulax, “to establish”)"
      ],
      "id": "en-байгуулсан-mn-verb-CKn3INlF",
      "links": [
        [
          "-сан",
          "-сан#Mongolian:_verb_suffix"
        ],
        [
          "байгуулах",
          "байгуулах#Mongolian"
        ],
        [
          "establish",
          "establish"
        ]
      ]
    }
  ],
  "word": "байгуулсан"
}

{
  "forms": [
    {
      "form": "bajguulsan",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "байгуулсан • (bajguulsan)",
      "name": "mn-verb-form"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Mongolian 3-syllable words",
        "Mongolian entries with incorrect language header",
        "Mongolian non-lemma forms",
        "Mongolian participles",
        "Mongolian terms with redundant script codes",
        "Mongolian verb forms"
      ],
      "glosses": [
        "past participle in -сан (-san) of байгуулах (bajguulax, “to establish”)"
      ],
      "links": [
        [
          "-сан",
          "-сан#Mongolian:_verb_suffix"
        ],
        [
          "байгуулах",
          "байгуулах#Mongolian"
        ],
        [
          "establish",
          "establish"
        ]
      ]
    }
  ],
  "word": "байгуулсан"
}