"-үү" meaning in Yakut

{
  "etymology_templates": [
    {
      "args": {
        "1": "tyv",
        "2": "-үк"
      },
      "expansion": "Tuvan -үк (-ük)",
      "name": "cog"
    },
    {
      "args": {
        "1": "kk",
        "2": "-у"
      },
      "expansion": "Kazakh -у (-u)",
      "name": "cog"
    }
  ],
  "etymology_text": "Cognate with Tuvan -үк (-ük), Kazakh -у (-u), etc.",
  "forms": [
    {
      "form": "-üü",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sah",
        "2": "suffixes"
      },
      "expansion": "-үү • (-üü)",
      "name": "head"
    }
  ],
  "lang": "Yakut",
  "lang_code": "sah",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Yakut entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Used to form gerunds from verbs."
      ],
      "id": "en--үү-sah-suffix-H4shQTw6",
      "links": [
        [
          "gerund",
          "gerund"
        ],
        [
          "verb",
          "verb"
        ]
      ],
      "related": [
        {
          "roman": "-uu",
          "word": "-уу"
        },
        {
          "roman": "-ii",
          "word": "-ии"
        },
        {
          "roman": "-ıı",
          "word": "-ыы"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-үү"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "tyv",
        "2": "-үк"
      },
      "expansion": "Tuvan -үк (-ük)",
      "name": "cog"
    },
    {
      "args": {
        "1": "kk",
        "2": "-у"
      },
      "expansion": "Kazakh -у (-u)",
      "name": "cog"
    }
  ],
  "etymology_text": "Cognate with Tuvan -үк (-ük), Kazakh -у (-u), etc.",
  "forms": [
    {
      "form": "-üü",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sah",
        "2": "suffixes"
      },
      "expansion": "-үү • (-üü)",
      "name": "head"
    }
  ],
  "lang": "Yakut",
  "lang_code": "sah",
  "pos": "suffix",
  "related": [
    {
      "roman": "-uu",
      "word": "-уу"
    },
    {
      "roman": "-ii",
      "word": "-ии"
    },
    {
      "roman": "-ıı",
      "word": "-ыы"
    }
  ],
  "senses": [
    {
      "categories": [
        "Yakut entries with incorrect language header",
        "Yakut lemmas",
        "Yakut suffixes",
        "Yakut vowel harmonic lemmas"
      ],
      "glosses": [
        "Used to form gerunds from verbs."
      ],
      "links": [
        [
          "gerund",
          "gerund"
        ],
        [
          "verb",
          "verb"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-үү"
}