"-o" meaning in Ido

{
  "etymology_templates": [
    {
      "args": {
        "1": "io",
        "2": "eo",
        "3": "-o"
      },
      "expansion": "Esperanto -o",
      "name": "der"
    },
    {
      "args": {
        "1": "io",
        "2": "roa"
      },
      "expansion": "Romance",
      "name": "der"
    }
  ],
  "etymology_text": "From Esperanto -o, from Romance languages.",
  "head_templates": [
    {
      "args": {
        "1": "io",
        "2": "suffix",
        "cat2": "noun-forming suffixes",
        "cat3": ""
      },
      "expansion": "-o",
      "name": "head"
    },
    {
      "args": {
        "1": "n"
      },
      "expansion": "-o",
      "name": "io-suffix"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ido entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 34 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "2 1 1 1 2 1 2 0 2 1 4 3 3 3 4 2 1 1 0 0 1 3 1 1 0 1 1 0 0 2 1 1 1 1 0 3 5 0 0 2 0 2 2 1 0 1 0 1 3 0 1 0 1 0 1 1 1 1 1 2 3 3 0 2 1 1 3 1 1 1 2 0 0 3 2 1",
          "kind": "other",
          "name": "Pages with 34 entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Nominal suffix. All Ido nouns end in -o."
      ],
      "id": "en--o-io-suffix-udhhPIO3",
      "links": [
        [
          "Nominal",
          "nominal#English"
        ],
        [
          "noun",
          "noun#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-o"
}

{
  "categories": [
    "Pages using catfix",
    "Pages with 34 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "io",
        "2": "eo",
        "3": "-o"
      },
      "expansion": "Esperanto -o",
      "name": "der"
    },
    {
      "args": {
        "1": "io",
        "2": "roa"
      },
      "expansion": "Romance",
      "name": "der"
    }
  ],
  "etymology_text": "From Esperanto -o, from Romance languages.",
  "head_templates": [
    {
      "args": {
        "1": "io",
        "2": "suffix",
        "cat2": "noun-forming suffixes",
        "cat3": ""
      },
      "expansion": "-o",
      "name": "head"
    },
    {
      "args": {
        "1": "n"
      },
      "expansion": "-o",
      "name": "io-suffix"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Ido entries with incorrect language header",
        "Ido lemmas",
        "Ido noun-forming suffixes",
        "Ido suffixes",
        "Ido terms derived from Esperanto",
        "Ido terms derived from Romance languages",
        "Pages with 34 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Nominal suffix. All Ido nouns end in -o."
      ],
      "links": [
        [
          "Nominal",
          "nominal#English"
        ],
        [
          "noun",
          "noun#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-o"
}