"-сем" meaning in Chuvash

{
  "etymology_templates": [
    {
      "args": {
        "1": "cv",
        "2": "trk-pro",
        "3": "*sāyïn",
        "4": "",
        "5": "every"
      },
      "expansion": "Proto-Turkic *sāyïn (“every”)",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Turkic *sāyïn (“every”).",
  "forms": [
    {
      "form": "-sem",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cv",
        "2": "suffix"
      },
      "expansion": "-сем • (-sem)",
      "name": "head"
    }
  ],
  "lang": "Chuvash",
  "lang_code": "cv",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Chuvash entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Suffix creating plurality."
      ],
      "id": "en--сем-cv-suffix-E29P~ivv",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-сем"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cv",
        "2": "trk-pro",
        "3": "*sāyïn",
        "4": "",
        "5": "every"
      },
      "expansion": "Proto-Turkic *sāyïn (“every”)",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Turkic *sāyïn (“every”).",
  "forms": [
    {
      "form": "-sem",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cv",
        "2": "suffix"
      },
      "expansion": "-сем • (-sem)",
      "name": "head"
    }
  ],
  "lang": "Chuvash",
  "lang_code": "cv",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Chuvash entries with incorrect language header",
        "Chuvash lemmas",
        "Chuvash suffixes",
        "Chuvash terms derived from Proto-Turkic",
        "Chuvash terms inherited from Proto-Turkic",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Suffix creating plurality."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-сем"
}