"-м" meaning in Mongolian

{
  "forms": [
    {
      "form": "-m",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ᠮ",
      "roman": "m",
      "tags": [
        "Mongolian"
      ]
    },
    {
      "form": "ᠮ᠎ᠠ",
      "roman": "m-a",
      "tags": [
        "Mongolian"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "ᠮ",
        "3": "ᠮ᠎ᠠ",
        "cat2": "noun-forming suffixes"
      },
      "expansion": "-м • (-m) (Mongolian spelling ᠮ (m) or ᠮ᠎ᠠ (m-a))",
      "name": "mn-suffix"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "suffix",
  "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": [
        "Seldom used suffix which forms nouns out of verbs"
      ],
      "id": "en--м-mn-suffix-c5-C5WwH",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-м"
}

{
  "forms": [
    {
      "form": "-m",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ᠮ",
      "roman": "m",
      "tags": [
        "Mongolian"
      ]
    },
    {
      "form": "ᠮ᠎ᠠ",
      "roman": "m-a",
      "tags": [
        "Mongolian"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "ᠮ",
        "3": "ᠮ᠎ᠠ",
        "cat2": "noun-forming suffixes"
      },
      "expansion": "-м • (-m) (Mongolian spelling ᠮ (m) or ᠮ᠎ᠠ (m-a))",
      "name": "mn-suffix"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Mongolian entries with incorrect language header",
        "Mongolian lemmas",
        "Mongolian noun-forming suffixes",
        "Mongolian suffixes",
        "Mongolian terms with redundant script codes"
      ],
      "glosses": [
        "Seldom used suffix which forms nouns out of verbs"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-м"
}