"-ъla" meaning in Proto-Slavic

{
  "etymology_templates": [
    {
      "args": {
        "1": "sla-pro",
        "2": "*-ъlъ",
        "3": "*-a",
        "g1": "m"
      },
      "expansion": "By surface analysis, *-ъlъ m + *-a",
      "name": "surf"
    }
  ],
  "etymology_text": "By surface analysis, *-ъlъ m + *-a.",
  "lang": "Proto-Slavic",
  "lang_code": "sla-pro",
  "original_title": "Reconstruction:Proto-Slavic/-ъla",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Slavic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Slavic terms suffixed with *-a",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Slavic terms suffixed with *-ъlъ",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "mesti + *-ъla → *metъla"
        },
        {
          "text": "migati + *-ъla → *migъla"
        },
        {
          "text": "jьgo + *-ъla → *jьgъla"
        }
      ],
      "form_of": [
        {
          "word": "*-ъlъ"
        }
      ],
      "glosses": [
        "feminine of *-ъlъ"
      ],
      "id": "en--ъla-sla-pro-suffix-bkvV8r8n",
      "links": [
        [
          "*-ъlъ",
          "Reconstruction:Proto-Slavic/-ъlъ"
        ]
      ],
      "related": [
        {
          "english": "attached onto i-stems",
          "sense": "*-la",
          "word": "-ьla"
        },
        {
          "english": "attached onto o-stems",
          "sense": "*-la",
          "word": "-оla"
        }
      ],
      "tags": [
        "feminine",
        "form-of",
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "-ъla"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sla-pro",
        "2": "*-ъlъ",
        "3": "*-a",
        "g1": "m"
      },
      "expansion": "By surface analysis, *-ъlъ m + *-a",
      "name": "surf"
    }
  ],
  "etymology_text": "By surface analysis, *-ъlъ m + *-a.",
  "lang": "Proto-Slavic",
  "lang_code": "sla-pro",
  "original_title": "Reconstruction:Proto-Slavic/-ъla",
  "pos": "suffix",
  "related": [
    {
      "english": "attached onto i-stems",
      "sense": "*-la",
      "word": "-ьla"
    },
    {
      "english": "attached onto o-stems",
      "sense": "*-la",
      "word": "-оla"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Proto-Slavic entries with incorrect language header",
        "Proto-Slavic feminine suffixes",
        "Proto-Slavic lemmas",
        "Proto-Slavic noun-forming suffixes",
        "Proto-Slavic suffixes",
        "Proto-Slavic terms suffixed with *-a",
        "Proto-Slavic terms suffixed with *-ъlъ"
      ],
      "examples": [
        {
          "text": "mesti + *-ъla → *metъla"
        },
        {
          "text": "migati + *-ъla → *migъla"
        },
        {
          "text": "jьgo + *-ъla → *jьgъla"
        }
      ],
      "form_of": [
        {
          "word": "*-ъlъ"
        }
      ],
      "glosses": [
        "feminine of *-ъlъ"
      ],
      "links": [
        [
          "*-ъlъ",
          "Reconstruction:Proto-Slavic/-ъlъ"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "-ъla"
}