"-udak" meaning in Proto-Finnic

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fi",
            "2": "-ua"
          },
          "expansion": "Finnish: -ua",
          "name": "desc"
        }
      ],
      "text": "Finnish: -ua"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "olo",
            "2": "-uo"
          },
          "expansion": "Livvi: -uo",
          "name": "desc"
        }
      ],
      "text": "Livvi: -uo"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "urj-pro",
        "3": "*-w-"
      },
      "expansion": "Proto-Uralic *-w-",
      "name": "inh"
    },
    {
      "args": {
        "1": "myv",
        "2": "неявомс",
        "3": "",
        "4": "to be visible, appear"
      },
      "expansion": "Erzya неявомс (nejavoms, “to be visible, appear”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Uralic *-w-. Compare -в- (-v-) in Erzya неявомс (nejavoms, “to be visible, appear”).",
  "forms": [
    {
      "form": "-udak / *-üdäk",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "-u- / *-ü-",
      "tags": [
        "stem"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "suffix",
        "3": "stem",
        "4": "*-u- / *-ü-",
        "cat2": "verb-forming suffixes",
        "head": "*-udak / *-üdäk"
      },
      "expansion": "*-udak / *-üdäk (stem *-u- / *-ü-)",
      "name": "head"
    }
  ],
  "lang": "Proto-Finnic",
  "lang_code": "urj-fin-pro",
  "original_title": "Reconstruction:Proto-Finnic/-udak",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Finnic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Forms mainly passive or anticausative verbs."
      ],
      "id": "en--udak-urj-fin-pro-suffix-rfiQhFg4",
      "tags": [
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "-udak"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fi",
            "2": "-ua"
          },
          "expansion": "Finnish: -ua",
          "name": "desc"
        }
      ],
      "text": "Finnish: -ua"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "olo",
            "2": "-uo"
          },
          "expansion": "Livvi: -uo",
          "name": "desc"
        }
      ],
      "text": "Livvi: -uo"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "urj-pro",
        "3": "*-w-"
      },
      "expansion": "Proto-Uralic *-w-",
      "name": "inh"
    },
    {
      "args": {
        "1": "myv",
        "2": "неявомс",
        "3": "",
        "4": "to be visible, appear"
      },
      "expansion": "Erzya неявомс (nejavoms, “to be visible, appear”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Uralic *-w-. Compare -в- (-v-) in Erzya неявомс (nejavoms, “to be visible, appear”).",
  "forms": [
    {
      "form": "-udak / *-üdäk",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "-u- / *-ü-",
      "tags": [
        "stem"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "suffix",
        "3": "stem",
        "4": "*-u- / *-ü-",
        "cat2": "verb-forming suffixes",
        "head": "*-udak / *-üdäk"
      },
      "expansion": "*-udak / *-üdäk (stem *-u- / *-ü-)",
      "name": "head"
    }
  ],
  "lang": "Proto-Finnic",
  "lang_code": "urj-fin-pro",
  "original_title": "Reconstruction:Proto-Finnic/-udak",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 1 entry",
        "Pages with entries",
        "Proto-Finnic entries with incorrect language header",
        "Proto-Finnic lemmas",
        "Proto-Finnic suffixes",
        "Proto-Finnic terms derived from Proto-Uralic",
        "Proto-Finnic terms inherited from Proto-Uralic",
        "Proto-Finnic verb-forming suffixes"
      ],
      "glosses": [
        "Forms mainly passive or anticausative verbs."
      ],
      "tags": [
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "-udak"
}