"-ait'ak" meaning in Proto-Finnic

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fi",
            "2": "-ajaa",
            "qq1": "dialectal, stem -aja-, e.g. <i class=\"Latn mention\" lang=\"fi\">heläjää</i>, <i class=\"Latn mention\" lang=\"fi\">kumajaa</i>"
          },
          "expansion": "Finnish: -ajaa (dialectal, stem -aja-, e.g. heläjää, kumajaa)",
          "name": "desc"
        }
      ],
      "text": "Finnish: -ajaa (dialectal, stem -aja-, e.g. heläjää, kumajaa)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "vep",
            "2": "-aita"
          },
          "expansion": "Veps: -aita",
          "name": "desc"
        }
      ],
      "text": "Veps: -aita"
    }
  ],
  "etymology_text": "Probably a variant of *-it'ak with rebracketing/re-extraction from a-stems into the suffix. The lack of the standard labialization *-ai- > *-oi- suggests a relatively recent origin or prevention of the sound change by analogy.",
  "forms": [
    {
      "form": "-ait'ak / *-äit'äk",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "-aida- / *-äidä-",
      "tags": [
        "stem"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "suffix",
        "3": "stem",
        "4": "*-aida- / *-äidä-",
        "cat2": "verb-forming suffixes",
        "head": "*-ait'ak / *-äit'äk"
      },
      "expansion": "*-ait'ak / *-äit'äk (stem *-aida- / *-äidä-)",
      "name": "head"
    }
  ],
  "lang": "Proto-Finnic",
  "lang_code": "urj-fin-pro",
  "original_title": "Reconstruction:Proto-Finnic/-ait'ak",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Finnic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "heläit'äk"
        },
        {
          "word": "kumait'ak"
        },
        {
          "word": "? *hauk'ait'ak"
        },
        {
          "word": "? *rabait'ak"
        }
      ],
      "glosses": [
        "Forms verbs, often continuative or frequentative, mainly from nominal stems."
      ],
      "id": "en--ait'ak-urj-fin-pro-suffix-HKLGveSN",
      "tags": [
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "-ait'ak"
}

{
  "derived": [
    {
      "word": "heläit'äk"
    },
    {
      "word": "kumait'ak"
    },
    {
      "word": "? *hauk'ait'ak"
    },
    {
      "word": "? *rabait'ak"
    }
  ],
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fi",
            "2": "-ajaa",
            "qq1": "dialectal, stem -aja-, e.g. <i class=\"Latn mention\" lang=\"fi\">heläjää</i>, <i class=\"Latn mention\" lang=\"fi\">kumajaa</i>"
          },
          "expansion": "Finnish: -ajaa (dialectal, stem -aja-, e.g. heläjää, kumajaa)",
          "name": "desc"
        }
      ],
      "text": "Finnish: -ajaa (dialectal, stem -aja-, e.g. heläjää, kumajaa)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "vep",
            "2": "-aita"
          },
          "expansion": "Veps: -aita",
          "name": "desc"
        }
      ],
      "text": "Veps: -aita"
    }
  ],
  "etymology_text": "Probably a variant of *-it'ak with rebracketing/re-extraction from a-stems into the suffix. The lack of the standard labialization *-ai- > *-oi- suggests a relatively recent origin or prevention of the sound change by analogy.",
  "forms": [
    {
      "form": "-ait'ak / *-äit'äk",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "-aida- / *-äidä-",
      "tags": [
        "stem"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "suffix",
        "3": "stem",
        "4": "*-aida- / *-äidä-",
        "cat2": "verb-forming suffixes",
        "head": "*-ait'ak / *-äit'äk"
      },
      "expansion": "*-ait'ak / *-äit'äk (stem *-aida- / *-äidä-)",
      "name": "head"
    }
  ],
  "lang": "Proto-Finnic",
  "lang_code": "urj-fin-pro",
  "original_title": "Reconstruction:Proto-Finnic/-ait'ak",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Proto-Finnic entries with incorrect language header",
        "Proto-Finnic lemmas",
        "Proto-Finnic suffixes",
        "Proto-Finnic verb-forming suffixes"
      ],
      "glosses": [
        "Forms verbs, often continuative or frequentative, mainly from nominal stems."
      ],
      "tags": [
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "-ait'ak"
}