"-estri" meaning in Ido

{
  "categories": [
    {
      "kind": "other",
      "name": "Anagramm sortiert (Ido)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Deklinierte Form (Ido)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ido",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Rückläufige Wörterliste (Ido)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Suffix (Ido)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Siehe auch",
      "orig": "siehe auch",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "other_pos": [
    "suffix"
  ],
  "pos": "suffix",
  "senses": [
    {
      "form_of": [
        {
          "word": "-estr"
        }
      ],
      "glosses": [
        "Substantiv Plural am Suffix -estr"
      ],
      "id": "de--estri-io-suffix-aajGcIyd",
      "tags": [
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "ˈestri"
    }
  ],
  "tags": [
    "form-of",
    "morpheme"
  ],
  "word": "-estri"
}

{
  "categories": [
    "Anagramm sortiert (Ido)",
    "Deklinierte Form (Ido)",
    "Ido",
    "Rückläufige Wörterliste (Ido)",
    "Suffix (Ido)",
    "siehe auch"
  ],
  "lang": "Ido",
  "lang_code": "io",
  "other_pos": [
    "suffix"
  ],
  "pos": "suffix",
  "senses": [
    {
      "form_of": [
        {
          "word": "-estr"
        }
      ],
      "glosses": [
        "Substantiv Plural am Suffix -estr"
      ],
      "tags": [
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "ˈestri"
    }
  ],
  "tags": [
    "form-of",
    "morpheme"
  ],
  "word": "-estri"
}